diff --git a/src/Bitmap.c b/src/Bitmap.c
index af3452653..f0058f769 100644
--- a/src/Bitmap.c
+++ b/src/Bitmap.c
@@ -507,7 +507,7 @@ ReturnCode Png_Decode(Bitmap* bmp, struct Stream* stream) {
 /*########################################################################################################################*
 *------------------------------------------------------PNG encoder--------------------------------------------------------*
 *#########################################################################################################################*/
-static ReturnCode Bitmap_Crc32StreamWrite(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode Bitmap_Crc32StreamWrite(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	struct Stream* source;
 	uint32_t i, crc32 = stream->Meta.CRC32.CRC32;
 
diff --git a/src/Deflate.c b/src/Deflate.c
index e3a2bbeb5..24edc0d91 100644
--- a/src/Deflate.c
+++ b/src/Deflate.c
@@ -895,7 +895,7 @@ static ReturnCode Deflate_FlushBlock(struct DeflateState* state, int len) {
 	return res;
 }
 
-static ReturnCode Deflate_StreamWrite(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode Deflate_StreamWrite(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	struct DeflateState* state;
 	ReturnCode res;
 
@@ -978,7 +978,7 @@ static ReturnCode GZip_StreamClose(struct Stream* stream) {
 	return Stream_Write(state->Base.Dest, data, sizeof(data));
 }
 
-static ReturnCode GZip_StreamWrite(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode GZip_StreamWrite(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	struct GZipState* state = stream->Meta.Inflate;
 	uint32_t i, crc32 = state->Crc32;
 	state->Size += count;
@@ -992,7 +992,7 @@ static ReturnCode GZip_StreamWrite(struct Stream* stream, uint8_t* data, uint32_
 	return Deflate_StreamWrite(stream, data, count, modified);
 }
 
-static ReturnCode GZip_StreamWriteFirst(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode GZip_StreamWriteFirst(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	static uint8_t header[10] = { 0x1F, 0x8B, 0x08 }; /* GZip header */
 	struct GZipState* state = stream->Meta.Inflate;
 	ReturnCode res;
@@ -1024,7 +1024,7 @@ static ReturnCode ZLib_StreamClose(struct Stream* stream) {
 	return Stream_Write(state->Base.Dest, data, sizeof(data));
 }
 
-static ReturnCode ZLib_StreamWrite(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode ZLib_StreamWrite(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	struct ZLibState* state = stream->Meta.Inflate;
 	uint32_t i, adler32 = state->Adler32;
 	uint32_t s1 = adler32 & 0xFFFF, s2 = (adler32 >> 16) & 0xFFFF;
@@ -1040,7 +1040,7 @@ static ReturnCode ZLib_StreamWrite(struct Stream* stream, uint8_t* data, uint32_
 	return Deflate_StreamWrite(stream, data, count, modified);
 }
 
-static ReturnCode ZLib_StreamWriteFirst(struct Stream* stream, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode ZLib_StreamWriteFirst(struct Stream* stream, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	static uint8_t header[2] = { 0x78, 0x9C }; /* ZLib header */
 	struct ZLibState* state = stream->Meta.Inflate;
 	ReturnCode res;
diff --git a/src/LScreens.c b/src/LScreens.c
index a2f99abf4..b731b409b 100644
--- a/src/LScreens.c
+++ b/src/LScreens.c
@@ -387,8 +387,6 @@ static void ColoursScreen_TextChanged(struct LInput* w) {
 	if (!Convert_ParseUInt8(&s->IptColours[index + 2].Text, &b)) return;
 
 	Launcher_SaveSkin();
-	Launcher_SaveOptions = true;
-
 	col->R = r; col->G = g; col->B = b;
 	Launcher_Redraw();
 }
@@ -436,6 +434,7 @@ static void ColoursScreen_KeyDown(struct LScreen* s, Key key) {
 
 static void ColoursScreen_ResetAll(void* widget, int x, int y) {
 	Launcher_ResetSkin();
+	Launcher_SaveSkin();
 	ColoursScreen_UpdateAll(&ColoursScreen_Instance);
 	Launcher_Redraw();
 }
@@ -1021,6 +1020,7 @@ static void UpdatesScreen_Format(struct LLabel* lbl, const char* prefix, TimeMS
 		}
 	}
 	LLabel_SetText(lbl, &str);
+	LWidget_Redraw(lbl);
 }
 
 static void UpdatesScreen_FormatBoth(struct UpdatesScreen* s) {
diff --git a/src/Launcher.c b/src/Launcher.c
index f75d644b3..6b6f2c6ba 100644
--- a/src/Launcher.c
+++ b/src/Launcher.c
@@ -227,9 +227,7 @@ void Launcher_Run(void) {
 
 	for (;;) {
 		Window_ProcessEvents();
-		if (!Window_Exists)      break;
-		if (Launcher_ShouldExit) break;
-		LWebTask_Tick(&CheckUpdateTask.Base);
+		if (!Window_Exists || Launcher_ShouldExit) break;
 
 		Launcher_Screen->Tick(Launcher_Screen);
 		if (Launcher_Dirty) Launcher_Display();
@@ -306,6 +304,7 @@ void Launcher_SaveSkin(void) {
 	Launcher_SetCol("launcher-btn-fore-active-col",        Launcher_ButtonForeActiveCol);
 	Launcher_SetCol("launcher-btn-fore-inactive-col",      Launcher_ButtonForeCol);
 	Launcher_SetCol("launcher-btn-highlight-inactive-col", Launcher_ButtonHighlightCol);
+	Launcher_SaveOptions = true;
 }
 
 
diff --git a/src/Platform.c b/src/Platform.c
index 14e6964da..78c46bc5c 100644
--- a/src/Platform.c
+++ b/src/Platform.c
@@ -144,8 +144,8 @@ void GraphicsMode_MakeDefault(struct GraphicsMode* m) {
 /*########################################################################################################################*
 *---------------------------------------------------------Memory----------------------------------------------------------*
 *#########################################################################################################################*/
-void Mem_Set(void* dst, uint8_t value, uint32_t numBytes) { memset(dst, value, numBytes); }
-void Mem_Copy(void* dst, void* src,  uint32_t numBytes)   { memcpy(dst, src,   numBytes); }
+void Mem_Set(void* dst, uint8_t value,    uint32_t numBytes) { memset(dst, value, numBytes); }
+void Mem_Copy(void* dst, const void* src, uint32_t numBytes) { memcpy(dst, src,   numBytes); }
 
 CC_NOINLINE static void Platform_AllocFailed(const char* place) {	
 	String log; char logBuffer[STRING_SIZE+20 + 1];
@@ -475,7 +475,7 @@ ReturnCode File_Read(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t*
 	return Win_Return(success);
 }
 
-ReturnCode File_Write(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t* bytesWrote) {
+ReturnCode File_Write(FileHandle file, const uint8_t* buffer, uint32_t count, uint32_t* bytesWrote) {
 	BOOL success = WriteFile(file, buffer, count, bytesWrote, NULL);
 	return Win_Return(success);
 }
@@ -601,7 +601,7 @@ ReturnCode File_Read(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t*
 	return Nix_Return(*bytesRead != -1);
 }
 
-ReturnCode File_Write(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t* bytesWrote) {
+ReturnCode File_Write(FileHandle file, const uint8_t* buffer, uint32_t count, uint32_t* bytesWrote) {
 	*bytesWrote = write(file, buffer, count);
 	return Nix_Return(*bytesWrote != -1);
 }
diff --git a/src/Platform.h b/src/Platform.h
index ef901e163..57d23d7d5 100644
--- a/src/Platform.h
+++ b/src/Platform.h
@@ -86,7 +86,7 @@ CC_EXPORT void  Mem_Free(void* mem);
 /* Sets the contents of a block of memory to the given value. */
 void Mem_Set(void* dst, uint8_t value, uint32_t numBytes);
 /* Copies a block of memory to another block. NOTE: These blocks MUST NOT overlap. */
-void Mem_Copy(void* dst, void* src, uint32_t numBytes);
+void Mem_Copy(void* dst, const void* src, uint32_t numBytes);
 
 /* Logs a debug message to console. */
 void Platform_Log(const String* message);
@@ -131,7 +131,7 @@ ReturnCode File_Append(FileHandle* file, const String* path);
 /* Attempts to read data from the file. */
 ReturnCode File_Read(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t* bytesRead);
 /* Attempts to write data to the file. */
-ReturnCode File_Write(FileHandle file, uint8_t* buffer, uint32_t count, uint32_t* bytesWrote);
+ReturnCode File_Write(FileHandle file, const uint8_t* buffer, uint32_t count, uint32_t* bytesWrote);
 /* Attempts to close the given file. */
 ReturnCode File_Close(FileHandle file);
 /* Attempts to seek to a position in the given file. */
diff --git a/src/Stream.c b/src/Stream.c
index e719e50cd..f7005edae 100644
--- a/src/Stream.c
+++ b/src/Stream.c
@@ -21,7 +21,7 @@ ReturnCode Stream_Read(struct Stream* s, uint8_t* buffer, uint32_t count) {
 	return 0;
 }
 
-ReturnCode Stream_Write(struct Stream* s, uint8_t* buffer, uint32_t count) {
+ReturnCode Stream_Write(struct Stream* s, const uint8_t* buffer, uint32_t count) {
 	uint32_t write;
 	ReturnCode res;
 
@@ -35,7 +35,7 @@ ReturnCode Stream_Write(struct Stream* s, uint8_t* buffer, uint32_t count) {
 	return 0;
 }
 
-static ReturnCode Stream_DefaultIO(struct Stream* s, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode Stream_DefaultIO(struct Stream* s, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	*modified = 0; return ReturnCode_NotSupported;
 }
 ReturnCode Stream_DefaultReadU8(struct Stream* s, uint8_t* data) {
@@ -86,7 +86,7 @@ void Stream_Init(struct Stream* s) {
 static ReturnCode Stream_FileRead(struct Stream* s, uint8_t* data, uint32_t count, uint32_t* modified) {
 	return File_Read(s->Meta.File, data, count, modified);
 }
-static ReturnCode Stream_FileWrite(struct Stream* s, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode Stream_FileWrite(struct Stream* s, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	return File_Write(s->Meta.File, data, count, modified);
 }
 static ReturnCode Stream_FileClose(struct Stream* s) {
@@ -213,7 +213,7 @@ static ReturnCode Stream_MemoryReadU8(struct Stream* s, uint8_t* data) {
 	return 0;
 }
 
-static ReturnCode Stream_MemoryWrite(struct Stream* s, uint8_t* data, uint32_t count, uint32_t* modified) {
+static ReturnCode Stream_MemoryWrite(struct Stream* s, const uint8_t* data, uint32_t count, uint32_t* modified) {
 	count = min(count, s->Meta.Mem.Left);
 	Mem_Copy(s->Meta.Mem.Cur, data, count);
 
@@ -352,21 +352,21 @@ void Stream_ReadonlyBuffered(struct Stream* s, struct Stream* source, void* data
 /*########################################################################################################################*
 *-------------------------------------------------Read/Write primitives---------------------------------------------------*
 *#########################################################################################################################*/
-uint16_t Stream_GetU16_LE(uint8_t* data) {
+uint16_t Stream_GetU16_LE(const uint8_t* data) {
 	return (uint16_t)(data[0] | (data[1] << 8));
 }
 
-uint16_t Stream_GetU16_BE(uint8_t* data) {
+uint16_t Stream_GetU16_BE(const uint8_t* data) {
 	return (uint16_t)((data[0] << 8) | data[1]);
 }
 
-uint32_t Stream_GetU32_LE(uint8_t* data) {
+uint32_t Stream_GetU32_LE(const uint8_t* data) {
 	return (uint32_t)(
 		 (uint32_t)data[0]        | ((uint32_t)data[1] << 8) |
 		((uint32_t)data[2] << 16) | ((uint32_t)data[3] << 24));
 }
 
-uint32_t Stream_GetU32_BE(uint8_t* data) {
+uint32_t Stream_GetU32_BE(const uint8_t* data) {
 	return (uint32_t)(
 		((uint32_t)data[0] << 24) | ((uint32_t)data[1] << 16) |
 		((uint32_t)data[2] << 8)  |  (uint32_t)data[3]);
diff --git a/src/Stream.h b/src/Stream.h
index 00c7dbc30..03d2dd158 100644
--- a/src/Stream.h
+++ b/src/Stream.h
@@ -15,7 +15,7 @@ struct Stream {
 	/* Attempts to efficiently read a single byte from this stream. (fallbacks to Read) */
 	ReturnCode (*ReadU8)(struct Stream* s, uint8_t* data);
 	/* Attempts to write some bytes to this stream. */
-	ReturnCode (*Write)(struct Stream* s, uint8_t* data, uint32_t count, uint32_t* modified);
+	ReturnCode (*Write)(struct Stream* s, const uint8_t* data, uint32_t count, uint32_t* modified);
 	/* Attempts to quickly advance the position in this stream. (falls back to reading then discarding) */
 	ReturnCode (*Skip)(struct Stream* s, uint32_t count);
 
@@ -43,7 +43,7 @@ struct Stream {
 /* Attempts to fully read up to count bytes from the stream. */
 ReturnCode Stream_Read(struct Stream* s, uint8_t* buffer, uint32_t count);
 /* Attempts to fully write up to count bytes from the stream. */
-ReturnCode Stream_Write(struct Stream* s, uint8_t* buffer, uint32_t count);
+ReturnCode Stream_Write(struct Stream* s, const uint8_t* buffer, uint32_t count);
 /* Initalises default function pointers for a stream. (all read, write, seeks return an error) */
 void Stream_Init(struct Stream* s);
 /* Slow way of reading a U8 integer through stream->Read(stream, 1, tmp). */
@@ -66,13 +66,13 @@ CC_EXPORT void Stream_WriteonlyMemory(struct Stream* s, void* data, uint32_t len
 CC_EXPORT void Stream_ReadonlyBuffered(struct Stream* s, struct Stream* source, void* data, uint32_t size);
 
 /* Reads a little-endian 16 bit unsigned integer from memory. */
-uint16_t Stream_GetU16_LE(uint8_t* data);
+uint16_t Stream_GetU16_LE(const uint8_t* data);
 /* Reads a big-endian 16 bit unsigned integer from memory. */
-uint16_t Stream_GetU16_BE(uint8_t* data);
+uint16_t Stream_GetU16_BE(const uint8_t* data);
 /* Reads a little-endian 32 bit unsigned integer from memory. */
-uint32_t Stream_GetU32_LE(uint8_t* data);
+uint32_t Stream_GetU32_LE(const uint8_t* data);
 /* Reads a big-endian 32 bit unsigned integer from memory. */
-uint32_t Stream_GetU32_BE(uint8_t* data);
+uint32_t Stream_GetU32_BE(const uint8_t* data);
 
 /* Writes a big-endian 16 bit unsigned integer to memory. */
 void Stream_SetU16_BE(uint8_t* data, uint16_t value);