diff --git a/.gitignore b/.gitignore
index 373f0803f..1159a493b 100755
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,6 @@ hs_err_pid*
 
 HMCLAPI/build/
 HMCL/build/
-HMCL/src/main/org/jackhuang/hellominecraft/launcher/servers/
+HMCLServer/
 HMCSM/build/
 MetroLookAndFeel/build/
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/DefaultPlugin.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/DefaultPlugin.java
index b22b4bfc4..06ebd4cf0 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/DefaultPlugin.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/DefaultPlugin.java
@@ -48,13 +48,17 @@ public class DefaultPlugin implements IPlugin {
     public void onRegisterAuthenticators(Consumer<IAuthenticator> apply) {
         String clientToken = Settings.getInstance().getClientToken();
         OFFLINE_LOGIN = new OfflineAuthenticator(clientToken);
+        OFFLINE_LOGIN.onLoadSettings(Settings.getInstance().getAuthenticatorConfig(OFFLINE_LOGIN.id()));
         YGGDRASIL_LOGIN = new YggdrasilAuthenticator(clientToken);
-        YGGDRASIL_LOGIN.onLoadSettings(Settings.getInstance().getYggdrasilConfig());
+        YGGDRASIL_LOGIN.onLoadSettings(Settings.getInstance().getAuthenticatorConfig(YGGDRASIL_LOGIN.id()));
         SKINME_LOGIN = new SkinmeAuthenticator(clientToken);
+        SKINME_LOGIN.onLoadSettings(Settings.getInstance().getAuthenticatorConfig(SKINME_LOGIN.id()));
 
-        Runtime.getRuntime().addShutdownHook(new Thread(()
-            -> Settings.getInstance().setYggdrasilConfig(YGGDRASIL_LOGIN.onSaveSettings())
-        ));
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+            Settings.getInstance().setAuthenticatorConfig(OFFLINE_LOGIN.id(), OFFLINE_LOGIN.onSaveSettings());
+            Settings.getInstance().setAuthenticatorConfig(YGGDRASIL_LOGIN.id(), YGGDRASIL_LOGIN.onSaveSettings());
+            Settings.getInstance().setAuthenticatorConfig(SKINME_LOGIN.id(), SKINME_LOGIN.onSaveSettings());
+        }));
         apply.accept(OFFLINE_LOGIN);
         apply.accept(YGGDRASIL_LOGIN);
         apply.accept(SKINME_LOGIN);
@@ -62,7 +66,7 @@ public class DefaultPlugin implements IPlugin {
 
     @Override
     public void showUI() {
-        MainFrame.showMainFrame(Settings.isFirstLoading());
+        MainFrame.showMainFrame();
     }
 
     @Override
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/MinecraftLoader.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/MinecraftLoader.java
index c1c3f8855..97b6a306e 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/MinecraftLoader.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/launch/MinecraftLoader.java
@@ -36,6 +36,7 @@ import org.jackhuang.hellominecraft.launcher.version.MinecraftLibrary;
 import org.jackhuang.hellominecraft.tasks.TaskWindow;
 import org.jackhuang.hellominecraft.utils.system.FileUtils;
 import org.jackhuang.hellominecraft.utils.MessageBox;
+import org.jackhuang.hellominecraft.utils.StrUtils;
 
 /**
  *
@@ -67,7 +68,7 @@ public class MinecraftLoader extends AbstractMinecraftLoader {
         res.add((v.isCanceledWrapper() ? "" : "-mainClass=") + mainClass);
 
         String arg = v.getSelectedMinecraftVersion().minecraftArguments;
-        String[] splitted = org.jackhuang.hellominecraft.utils.StrUtils.tokenize(arg);
+        String[] splitted = StrUtils.tokenize(arg);
 
         if (!checkAssetsExist())
             if (MessageBox.Show(C.i18n("assets.no_assets"), MessageBox.YES_NO_OPTION) == MessageBox.YES_OPTION) {
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Config.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Config.java
index 76c1ff26f..46e9b4a8d 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Config.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Config.java
@@ -20,6 +20,7 @@ package org.jackhuang.hellominecraft.launcher.settings;
 import org.jackhuang.hellominecraft.launcher.utils.download.DownloadType;
 import com.google.gson.annotations.SerializedName;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
@@ -40,8 +41,6 @@ public final class Config {
     private String last;
     @SerializedName("bgpath")
     private String bgpath;
-    @SerializedName("username")
-    private String username;
     @SerializedName("clientToken")
     private final String clientToken;
     private String proxyHost, proxyPort, proxyUserName, proxyPassword;
@@ -116,15 +115,6 @@ public final class Config {
         Settings.save();
     }
 
-    public String getUsername() {
-        return username;
-    }
-
-    public void setUsername(String username) {
-        this.username = username;
-        Settings.save();
-    }
-
     public String getClientToken() {
         return clientToken;
     }
@@ -163,12 +153,12 @@ public final class Config {
         return configurations;
     }
 
-    public Map getYggdrasilConfig() {
-        return yggdrasil;
+    public Map getAuthenticatorConfig(String authId) {
+        return auth.get(authId);
     }
 
-    public void setYggdrasilConfig(Map yggdrasil) {
-        this.yggdrasil = yggdrasil;
+    public void setAuthenticatorConfig(String authId, Map map) {
+        auth.put(authId, map);
         Settings.save();
     }
 
@@ -178,17 +168,17 @@ public final class Config {
     private int downloadtype;
     @SerializedName("configurations")
     private TreeMap<String, Profile> configurations;
-    @SerializedName("yggdrasil")
-    private Map yggdrasil;
+    @SerializedName("auth")
+    private Map<String, Map> auth;
 
     public Config() {
         clientToken = UUID.randomUUID().toString();
-        username = "";
         logintype = downloadtype = 0;
         enableShadow = false;
         enableAnimation = true;
         theme = 4;
         decorated = OS.os() == OS.LINUX;
+        auth = new HashMap<>();
     }
 
     public DownloadType getDownloadSource() {
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Settings.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Settings.java
index 7d15f06e6..660c9b413 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Settings.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/settings/Settings.java
@@ -32,7 +32,6 @@ import org.jackhuang.hellominecraft.utils.CollectionUtils;
 import org.jackhuang.hellominecraft.utils.system.FileUtils;
 import org.jackhuang.hellominecraft.utils.system.IOUtils;
 import org.jackhuang.hellominecraft.utils.MessageBox;
-import org.jackhuang.hellominecraft.utils.StrUtils;
 import org.jackhuang.hellominecraft.utils.UpdateChecker;
 import org.jackhuang.hellominecraft.utils.VersionNumber;
 import org.jackhuang.hellominecraft.utils.system.Java;
@@ -48,7 +47,6 @@ public final class Settings {
 
     public static final File SETTINGS_FILE = new File(IOUtils.currentDir(), "hmcl.json");
 
-    private static boolean isFirstLoading;
     private static final Config SETTINGS;
     public static final UpdateChecker UPDATE_CHECKER = new UpdateChecker(new VersionNumber(Main.VERSION_FIRST, Main.VERSION_SECOND, Main.VERSION_THIRD),
                                                                          "hmcl");
@@ -58,10 +56,6 @@ public final class Settings {
         return SETTINGS;
     }
 
-    public static boolean isFirstLoading() {
-        return isFirstLoading;
-    }
-
     static {
         SETTINGS = initSettings();
         if (!getProfiles().containsKey(DEFAULT_PROFILE))
@@ -82,7 +76,7 @@ public final class Settings {
 
     private static Config initSettings() {
         Config c = new Config();
-        if (SETTINGS_FILE.exists()) {
+        if (SETTINGS_FILE.exists())
             try {
                 String str = FileUtils.readFileToString(SETTINGS_FILE);
                 if (str == null || str.trim().equals(""))
@@ -100,11 +94,8 @@ public final class Settings {
                     System.exit(1);
                 }
             }
-            isFirstLoading = StrUtils.isBlank(c.getUsername());
-        } else {
+        else
             HMCLog.log("No settings file here, may be first loading.");
-            isFirstLoading = true;
-        }
         return c;
     }
 
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/BestLogin.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/BestLogin.java
index 229484564..e23501750 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/BestLogin.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/BestLogin.java
@@ -79,6 +79,11 @@ public final class BestLogin extends IAuthenticator {
         }
     }
 
+    @Override
+    public String id() {
+        return "best";
+    }
+
     @Override
     public String getName() {
         return "BestLogin";
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/IAuthenticator.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/IAuthenticator.java
index 711b7e663..37809270c 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/IAuthenticator.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/IAuthenticator.java
@@ -18,7 +18,9 @@
 package org.jackhuang.hellominecraft.launcher.utils.auth;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import org.jackhuang.hellominecraft.launcher.api.PluginManager;
 
 /**
@@ -34,7 +36,7 @@ public abstract class IAuthenticator {
         PluginManager.NOW_PLUGIN.onRegisterAuthenticators(LOGINS::add);
     }
 
-    protected String clientToken;
+    protected String clientToken, username;
 
     public IAuthenticator(String clientToken) {
         this.clientToken = clientToken;
@@ -52,6 +54,8 @@ public abstract class IAuthenticator {
      */
     public abstract UserProfileProvider login(LoginInfo info) throws AuthenticationException;
 
+    public abstract String id();
+
     /**
      *
      * @return the name of login method.
@@ -78,4 +82,24 @@ public abstract class IAuthenticator {
     public abstract UserProfileProvider loginBySettings() throws AuthenticationException;
 
     public abstract void logout();
+
+    public Map onSaveSettings() {
+        HashMap m = new HashMap();
+        m.put("IAuthenticator_UserName", username);
+        return m;
+    }
+
+    public void onLoadSettings(Map m) {
+        if (m == null)
+            return;
+        username = (String) m.get("IAuthenticator_UserName");
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String s) {
+        username = s;
+    }
 }
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/OfflineAuthenticator.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/OfflineAuthenticator.java
index 3f27c2d66..2f1d36c37 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/OfflineAuthenticator.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/OfflineAuthenticator.java
@@ -49,6 +49,11 @@ public final class OfflineAuthenticator extends IAuthenticator {
         return DigestUtils.md5Hex(str);
     }
 
+    @Override
+    public String id() {
+        return "offline";
+    }
+
     @Override
     public String getName() {
         return C.i18n("login.methods.offline");
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/SkinmeAuthenticator.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/SkinmeAuthenticator.java
index 7ada3b176..a5e9636fc 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/SkinmeAuthenticator.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/SkinmeAuthenticator.java
@@ -104,6 +104,11 @@ public final class SkinmeAuthenticator extends IAuthenticator {
         }
     }
 
+    @Override
+    public String id() {
+        return "skinme";
+    }
+
     @Override
     public String getName() {
         return "Skinme";
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/YggdrasilAuthenticator.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/YggdrasilAuthenticator.java
index 650a8c61d..ab8ab0da6 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/YggdrasilAuthenticator.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/auth/YggdrasilAuthenticator.java
@@ -92,16 +92,26 @@ public final class YggdrasilAuthenticator extends IAuthenticator {
         return ua.isLoggedIn();
     }
 
+    @Override
+    public String id() {
+        return "yggdrasil";
+    }
+
     @Override
     public String getName() {
         return C.i18n("login.methods.yggdrasil");
     }
 
+    @Override
     public Map onSaveSettings() {
-        return ua.saveForStorage();
+        Map m = ua.saveForStorage();
+        m.putAll(super.onSaveSettings());
+        return m;
     }
 
+    @Override
     public void onLoadSettings(Map settings) {
+        super.onLoadSettings(settings);
         if (settings == null)
             return;
         ua.loadFromStorage(settings);
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java
index e5eb363a1..05e96145f 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java
@@ -1241,7 +1241,7 @@ public final class GameSettingsPanel extends AnimatedPanel implements DropTarget
     // <editor-fold defaultstate="collapsed" desc="Mods">
     private boolean reloadingMods = false;
 
-    private void reloadMods() {
+    private synchronized void reloadMods() {
         if (reloadingMods)
             return;
         reloadingMods = true;
@@ -1343,6 +1343,6 @@ public final class GameSettingsPanel extends AnimatedPanel implements DropTarget
     private javax.swing.JTextField txtWidth;
     // End of variables declaration//GEN-END:variables
 
-    private javax.swing.JPanel pnlGameDownloads;
+    private final javax.swing.JPanel pnlGameDownloads;
 // </editor-fold>
 }
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainFrame.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainFrame.java
index ca82f9e48..ec53f73cd 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainFrame.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainFrame.java
@@ -47,6 +47,7 @@ import org.jackhuang.hellominecraft.launcher.settings.Settings;
 import org.jackhuang.hellominecraft.launcher.utils.auth.IAuthenticator;
 import org.jackhuang.hellominecraft.lookandfeel.GraphicsUtils;
 import org.jackhuang.hellominecraft.lookandfeel.Theme;
+import org.jackhuang.hellominecraft.utils.StrUtils;
 import org.jackhuang.hellominecraft.utils.Utils;
 import org.jackhuang.hellominecraft.views.DropShadowBorder;
 import org.jackhuang.hellominecraft.views.TintablePanel;
@@ -388,10 +389,10 @@ public final class MainFrame extends DraggableFrame {
         windowTitle.setForeground(Color.white);
     }
 
-    public static void showMainFrame(boolean firstLoad) {
-        if (firstLoad)
-            SwingUtilities.invokeLater(() -> MainFrame.INSTANCE.showMessage(C.i18n("ui.message.first_load")));
+    public static void showMainFrame() {
         IAuthenticator l = Settings.getInstance().getAuthenticator();
+        if (StrUtils.isBlank(l.getUsername()))
+            SwingUtilities.invokeLater(() -> MainFrame.INSTANCE.showMessage(C.i18n("ui.message.first_load")));
         if (l.hasPassword() && !l.isLoggedIn())
             SwingUtilities.invokeLater(() -> MainFrame.INSTANCE.showMessage(C.i18n("ui.message.enter_password")));
         INSTANCE.setVisible(true);
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainPagePanel.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainPagePanel.java
index bd24df449..d46b41d25 100755
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainPagePanel.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/MainPagePanel.java
@@ -297,7 +297,8 @@ public class MainPagePanel extends AnimatedPanel implements Event<String> {
     }//GEN-LAST:event_txtPlayerNameFocusGained
 
     private void txtPlayerNameFocusLost(java.awt.event.FocusEvent evt) {//GEN-FIRST:event_txtPlayerNameFocusLost
-        Settings.getInstance().setUsername(txtPlayerName.getText());
+        IAuthenticator l = Settings.getInstance().getAuthenticator();
+        l.setUsername(txtPlayerName.getText());
     }//GEN-LAST:event_txtPlayerNameFocusLost
 
     private void cboLoginModeItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_cboLoginModeItemStateChanged
@@ -350,8 +351,8 @@ public class MainPagePanel extends AnimatedPanel implements Event<String> {
 
     private void txtPlayerNameKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtPlayerNameKeyPressed
         if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
-            Settings.getInstance().setUsername(txtPlayerName.getText());
             IAuthenticator l = Settings.getInstance().getAuthenticator();
+            l.setUsername(txtPlayerName.getText());
             if (!l.hasPassword())
                 runGame();
             else if (!l.isLoggedIn())
@@ -400,7 +401,7 @@ public class MainPagePanel extends AnimatedPanel implements Event<String> {
             return;
         }
         final IAuthenticator l = IAuthenticator.LOGINS.get(index);
-        final LoginInfo li = new LoginInfo(Settings.getInstance().getUsername(), l.isLoggedIn() || !l.hasPassword() ? null : new String(txtPassword.getPassword()));
+        final LoginInfo li = new LoginInfo(l.getUsername(), l.isLoggedIn() || !l.hasPassword() ? null : new String(txtPassword.getPassword()));
         new Thread() {
             @Override
             public void run() {
@@ -458,9 +459,10 @@ public class MainPagePanel extends AnimatedPanel implements Event<String> {
             cl.last(pnlPassword);
         else
             cl.first(pnlPassword);
-        String username = Settings.getInstance().getUsername();
-        if (StrUtils.isNotBlank(username))
-            txtPlayerName.setText(username);
+        String username = l.getUsername();
+        if (username == null)
+            username = "";
+        txtPlayerName.setText(username);
     }
 
     void loadFromSettings() {
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/ServerPlugin.java b/HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/ServerPlugin.java
similarity index 100%
rename from HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/ServerPlugin.java
rename to HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/ServerPlugin.java
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/CheckModsMinecraftProvider.java b/HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/CheckModsMinecraftProvider.java
similarity index 100%
rename from HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/CheckModsMinecraftProvider.java
rename to HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/CheckModsMinecraftProvider.java
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/MFCraftAuthenticator.java b/HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/MFCraftAuthenticator.java
similarity index 100%
rename from HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/MFCraftAuthenticator.java
rename to HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/MFCraftAuthenticator.java
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/ServerArea.java b/HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/ServerArea.java
similarity index 100%
rename from HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/ServerArea.java
rename to HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/ServerArea.java
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/Servers.java b/HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/Servers.java
similarity index 100%
rename from HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/servers/mfcraft/Servers.java
rename to HMCLServer/src/main/java/org.jackhuang.hellominecraft.launcher/servers/mfcraft/Servers.java