diff --git a/HMCL/proguard.pro b/HMCL/proguard.pro
index a972927cc..591e972cf 100644
--- a/HMCL/proguard.pro
+++ b/HMCL/proguard.pro
@@ -45,7 +45,7 @@
 -keep class org.jackhuang.hellominecraft.launcher.Launcher { public static void main(java.lang.String[]); }
 
 -keepclassmembers class org.jackhuang.hellominecraft.launcher.utils.settings.Profile { private <fields>; public <fields>; }
--keepclassmembers class org.jackhuang.hellominecraft.launcher.utils.settings.Config { public <fields>; }
+-keepclassmembers class org.jackhuang.hellominecraft.launcher.utils.settings.Config { private <fields>; }
 
 -keepclassmembers class org.jackhuang.hellominecraft.launcher.utils.assets.AssetsObject { <fields>; }
 -keepclassmembers class org.jackhuang.hellominecraft.launcher.utils.assets.AssetsIndex { <fields>; }
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/Launcher.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/Launcher.java
index 29ccbb2e7..e6d7e6606 100644
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/Launcher.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/Launcher.java
@@ -105,7 +105,7 @@ public final class Launcher {
             return;
         }
 
-        if (!JdkVersion.isJava64Bit() && Platform.getPlatform() == Platform.BIT_32)
+        if (!JdkVersion.isJava64Bit() && Platform.getPlatform() == Platform.BIT_64)
             MessageBox.Show(C.i18n("advice.os64butjdk32"));
 
         Method minecraftMain;
diff --git a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/settings/Config.java b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/settings/Config.java
index 8ddd51835..690ab3b51 100644
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/settings/Config.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/utils/settings/Config.java
@@ -44,7 +44,7 @@ public final class Config {
     private boolean enableShadow;
     @SerializedName("theme")
     private int theme;
-    
+    @SerializedName("java")
     private List<JdkVersion> java;
 
     public List<JdkVersion> getJava() {
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 33a7f60f5..53f349937 100644
--- a/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java
+++ b/HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/views/GameSettingsPanel.java
@@ -19,6 +19,7 @@ package org.jackhuang.hellominecraft.launcher.views;
 import java.awt.Color;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.ItemEvent;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -931,9 +932,15 @@ btnRefreshLiteLoader.addActionListener(new java.awt.event.ActionListener() {
     }//GEN-LAST:event_btnRemoveProfileActionPerformed
 
     private void cboVersionsItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_cboVersionsItemStateChanged
-        if (isLoading || cboVersions.getSelectedIndex() < 0 || StrUtils.isBlank((String) cboVersions.getSelectedItem()) || getProfile() == null) return;
+        
+        if (isLoading || evt.getStateChange() != ItemEvent.SELECTED || cboVersions.getSelectedIndex() < 0 || StrUtils.isBlank((String) cboVersions.getSelectedItem()) || getProfile() == null)
+            return;
         loadMinecraftVersion((String) cboVersions.getSelectedItem());
         versionChanged(getProfile(), (String) cboVersions.getSelectedItem());
+        
+        getProfile().setSelectedMinecraftVersion(cboVersions.getSelectedItem().toString());
+        cboVersions.setToolTipText(cboVersions.getSelectedItem().toString());
+        Settings.save();
     }//GEN-LAST:event_cboVersionsItemStateChanged
 
     private void btnRefreshVersionsActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnRefreshVersionsActionPerformed
diff --git a/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/OS.java b/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/OS.java
index f09989409..c79732b7a 100644
--- a/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/OS.java
+++ b/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/OS.java
@@ -62,7 +62,7 @@ public enum OS {
             OperatingSystemMXBean o = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
             return o.getTotalPhysicalMemorySize();
         } catch(Throwable t) {
-            HMCLog.warn("Failed to get total physical memory size", t);
+            HMCLog.warn("Failed to get total physical memory size");
             return -1;
         }
     }
diff --git a/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/Platform.java b/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/Platform.java
index 525bb4178..26827c6d6 100644
--- a/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/Platform.java
+++ b/HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/Platform.java
@@ -50,7 +50,6 @@ public enum Platform {
     public abstract String getBit();
     
     public static Platform getPlatform() {
-	String arch = System.getProperty("os.arch");
-	return arch.contains("64") ? Platform.BIT_64 : Platform.BIT_32;
+	return System.getProperty("os.arch").contains("64") ? BIT_64 : BIT_32;
     }
 }