diff --git a/app/src/main/assets/about_en.txt b/app/src/main/assets/about_en.txt
index 9b664140b..82a030b8f 100644
--- a/app/src/main/assets/about_en.txt
+++ b/app/src/main/assets/about_en.txt
@@ -2,11 +2,11 @@
 * Using libraries:<br>
  • ClassWrapperMC: A simple wrapper to help launching Minecraft LaunchWrapper on JRE9 and later.<br>
  • gl4es: OpenGL for OpenGL ES devices by lunixbochs and ptitSeb.<br>
- • OpenJDK JRE 10 for Android by dongfangxunlei.<br>
+ • OpenJDK JRE 8 for Android.<br>
  • Apache Commons Compress.<br>
  • LWJGL.<br>
 * License:<br>
- • This application and ClassWrapperMC are licensed under <a href="https://github.com/khanhduytran0/PojavLauncher/blob/master/LICENSE">Apache License 2.0</a>.<br>
+ • This application is licensed under <a href="https://github.com/khanhduytran0/PojavLauncher/blob/master/LICENSE">GNU GPLv3</a>.<br>
 * Third party licenses:<br>
  • Apache Commons Compress (unknown or Apache License 2.0).<br>
  • gl4es: <a href="https://github.com/ptitSeb/gl4es/blob/master/LICENSE">MIT License</a>.<br>
diff --git a/app/src/main/assets/current_changelog.txt b/app/src/main/assets/current_changelog.txt
deleted file mode 100644
index 79e60ae50..000000000
--- a/app/src/main/assets/current_changelog.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-Version 2.4.2
-
-* Changed (user):
-- Translate is easier than before.
-- UI layout now fit to the big screen.
-- Fixed click event triggered after touch screen.
-- Migrated libraries, versions, gamedir folders to /sdcard/games/minecraft
-- Added option set max DX references.
-
-* Changed (development):
-- Redesigned partially of UI.
-- Added 'Do not show again' to warning to unsupported Android version.
-- Moved strings to /res/values/strings.xml for easy translating.
-- Fixed touch event trigger as click on LWJGL (exist from Boardwalk)
-- Migrate all folders to single to match Java.
-- Added javax.sound.midi, javax.script.
-- Moved to use JsonArguments
-
-* The first as '#' for FIXED or DID IT.
-* Or as '$' for PARTIAL '#'.
-
-* Know issuses from 2.4 affect in Android 9 devices.
-- Cannot find class 'com.google.guava.?' (#E0402)
-
-* TODO of the launcher:
-# Clean unused AWT classes.
-# Optimize more performance of AWT classes.
-$ Fill in all missing classes.
-$ Redesign user interface.
-$ Run without VMOS (VMOS takes ~500MB for secondary Android system).
-- External mouse tracker.
-- Make LWJGL3 and GLFW translator code to LWJGL2.
-- Support client 1.13 and above.
diff --git a/app/src/main/assets/old_multidoj.txt b/app/src/main/assets/old_multidoj.txt
deleted file mode 100644
index d5c3b7b9f..000000000
--- a/app/src/main/assets/old_multidoj.txt
+++ /dev/null
@@ -1,32 +0,0 @@
- - multidoj is a modified version of dx.jar (dexer tool).
- - It creates raw dex files and a resources.jar in multidoj folder, make the RAM usage is fewer than dx.
- - multidoj implements multidex and process listener for embedding to an app.
-
-NOTE: multidoj24 is unstable on Android 7.0 and up. So may not support...
- 
-How to use multidoj:
- - For embedding to your app:
-  + Make sure you have added these import:
-   // Begin code
-   import com.android.dx.observer.ObserverStatus;
-   // End code
-  + Next, set the listener when processing files:
-   // Begin code
-   ObserverStatus.setListener(new ObserverStatus.ProcessListener(){
-       @Override
-       public void onProcess(String msg, int max, int current) {
-           // Implements your code here
-       }
-   });
-   // End code
-  + Finally, convert a file:
-   // Begin code
-   String INPUT_FILE = "(your input file path)";
-   String OUTPUT_FILE = "(your output file path)";
-   
-   com.android.dx.command.Main.main(
-    "--dex", "--output", OUTPUT_FILE, INPUT_FILE
-   );
-   // End code
- - For load via JarClassLoader
- NOTE: Only dexer feature has observer.