diff --git a/app/build.gradle b/app/build.gradle
index 93be97747..8b0810f79 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -28,7 +28,7 @@ android {
         multiDexEnabled true //important
 		
 		ndk {
-            abiFilters "armeabi-v7a" // , "arm64-v8a"
+            abiFilters "armeabi-v7a", "arm64-v8a"
         }
     }
 	
diff --git a/app/src/main/java/net/kdt/pojavlaunch/PojavLoginActivity.java b/app/src/main/java/net/kdt/pojavlaunch/PojavLoginActivity.java
index d7e0618dd..0c80030b8 100644
--- a/app/src/main/java/net/kdt/pojavlaunch/PojavLoginActivity.java
+++ b/app/src/main/java/net/kdt/pojavlaunch/PojavLoginActivity.java
@@ -41,8 +41,7 @@ public class PojavLoginActivity extends AppCompatActivity
 	
 	private SharedPreferences firstLaunchPrefs;
 	// private final String PREF_IS_DONOTSHOWAGAIN_WARN = "isWarnDoNotShowAgain";
-	private final String PREF_IS_INSTALLED_LIBRARIES = "isLibrariesExtracted2";
-    private final String PREF_IS_INSTALLED_JAVARUNTIME = "isJavaRuntimeInstalled";
+    public static final String PREF_IS_INSTALLED_JAVARUNTIME = "isJavaRuntimeInstalled";
 	
 	private boolean isInitCalled = false;
 	@Override
@@ -294,10 +293,6 @@ public class PojavLoginActivity extends AppCompatActivity
 	private boolean isJavaRuntimeInstalled() {
 		return firstLaunchPrefs.getBoolean(PREF_IS_INSTALLED_JAVARUNTIME, false);
 	}
-
-	private boolean isLibrariesExtracted() {
-		return firstLaunchPrefs.getBoolean(PREF_IS_INSTALLED_LIBRARIES, false);
-	}
 	
 	private boolean setPref(String prefName, boolean value) {
 		return firstLaunchPrefs.edit().putBoolean(prefName, value).commit();
diff --git a/app/src/main/java/net/kdt/pojavlaunch/Tools.java b/app/src/main/java/net/kdt/pojavlaunch/Tools.java
index 9c2aa6680..0d743dd81 100644
--- a/app/src/main/java/net/kdt/pojavlaunch/Tools.java
+++ b/app/src/main/java/net/kdt/pojavlaunch/Tools.java
@@ -665,7 +665,6 @@ public final class Tools
 		return out;
 	}
 	
-	// Current Useless below but keep it for future usage.
 	public static void deleteRecursive(File fileOrDirectory) {
 		try {
 			if (fileOrDirectory.isDirectory()) {
diff --git a/app/src/main/java/net/kdt/pojavlaunch/prefs/LauncherPreferenceFragment.java b/app/src/main/java/net/kdt/pojavlaunch/prefs/LauncherPreferenceFragment.java
index 20a9846d3..f194aea72 100644
--- a/app/src/main/java/net/kdt/pojavlaunch/prefs/LauncherPreferenceFragment.java
+++ b/app/src/main/java/net/kdt/pojavlaunch/prefs/LauncherPreferenceFragment.java
@@ -12,14 +12,9 @@ public class LauncherPreferenceFragment extends PreferenceFragmentCompat
 	public void onCreatePreferences(Bundle b, String str) {
 		addPreferencesFromResource(R.xml.pref_main);
 		
-		// Disable freeform mode in Android 6.0 or below.
+		// Disable freeform mode in Android 6.0 and below.
 		findPreference("freeform").setEnabled(Build.VERSION.SDK_INT >= 24);
 		
-		SeekBarPreference seek1 = (SeekBarPreference) findPreference("maxDxRefs");
-		seek1.setMin(0xFFF);
-		seek1.setMax(0xFFFF);
-		seek1.setValue(0xFFF);
-		
 		SeekBarPreference seek2 = (SeekBarPreference) findPreference("timeLongPressTrigger");
 		seek2.setMin(100);
 		seek2.setMax(1000);
diff --git a/app/src/main/java/net/kdt/pojavlaunch/prefs/UninstallJREDialogPreference.java b/app/src/main/java/net/kdt/pojavlaunch/prefs/UninstallJREDialogPreference.java
new file mode 100644
index 000000000..a1923e2ab
--- /dev/null
+++ b/app/src/main/java/net/kdt/pojavlaunch/prefs/UninstallJREDialogPreference.java
@@ -0,0 +1,35 @@
+package net.kdt.pojavlaunch.prefs;
+
+import android.content.*;
+import android.support.v7.preference.*;
+import android.util.*;
+import java.io.*;
+import net.kdt.pojavlaunch.*;
+
+import net.kdt.pojavlaunch.R;
+import android.widget.*;
+
+public class UninstallJREDialogPreference extends DialogPreference implements DialogInterface.OnClickListener
+{
+    public UninstallJREDialogPreference(Context ctx) {
+        this(ctx, null);
+    }
+    
+    public UninstallJREDialogPreference(Context ctx, AttributeSet attrs) {
+        super(ctx, attrs);
+        setDialogMessage(R.string.mcl_setting_title_uninstalljre);
+        setPositiveButtonText(android.R.string.ok);
+        setNegativeButtonText(android.R.string.cancel);
+    }
+    
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        if (which == DialogInterface.BUTTON_POSITIVE) {
+            Tools.deleteRecursive(new File(Tools.homeJreDir));
+            getContext().getSharedPreferences("pojav_extract", Context.MODE_PRIVATE)
+                .edit().putBoolean(PojavLoginActivity.PREF_IS_INSTALLED_JAVARUNTIME, false).commit();
+            
+            Toast.makeText(getContext(), R.string.toast_uninstalljre_done, Toast.LENGTH_SHORT).show();
+        }
+    }
+}
diff --git a/app/src/main/jniLibs/arm64-v8a/libopenal.so b/app/src/main/jniLibs/arm64-v8a/libopenal.so
new file mode 100644
index 000000000..b7aec3046
Binary files /dev/null and b/app/src/main/jniLibs/arm64-v8a/libopenal.so differ
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 1e302cca2..820285292 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -44,7 +44,7 @@
 	<string name="warning_remove_account">This account will be removed!</string>
 	
 	<!-- AlertDialog title -->
-	<string name="alerttitle_install_jre">Install Java Runtime (.tar.xz)</string>
+	<string name="alerttitle_install_jre">Install Java Runtime %s (.tar.xz)</string>
 	<string name="alerttitle_selectkeymap">Select a keymap json</string>
 	<string name="alerttitle_installmod">Select a mod to install</string>
 	
@@ -62,6 +62,7 @@
 	<string name="toast_permission_denied">The read/write to storage permission is required!</string>
 	<string name="toast_login_error">Something went wrong after login. Please feedback to the developer.\nError: %s</string>
 	<string name="toast_optifine_success">Install successful</string>
+	<string name="toast_uninstalljre_done">Done uninstall Java Runtime</string>
 	<!--
 	<string name="toast_3">Exit</string>
 	-->
@@ -90,8 +91,8 @@
 	<string name="mcl_option_settings">Settings</string>
 	<string name="mcl_option_about">About</string>
 	
-	<string name="mcl_setting_title_setmaxdxref">Set max DX references</string>
-	<string name="mcl_setting_subtitle_setmaxdxref">Increase If an error happend while converting: Too many ... references. You may try multi-dex option. Recommended: 4096 or 8192.</string>
+	<string name="mcl_setting_title_uninstalljre">Uninstall Java Runtime</string>
+	<string name="mcl_setting_subtitle_uninstalljre">[Launcher restart required] This let you re-install Java Runtime</string>
 	<string name="mcl_setting_title_freeform">Launch Minecraft in Freeform mode</string>
 	<string name="mcl_setting_subtitle_freeform">Launch Minecraft in floating window. Requires Android 7.0+</string>
 	<string name="mcl_setting_title_longpresstrigger">How long will trigger after long press</string>
diff --git a/app/src/main/res/xml/pref_main.xml b/app/src/main/res/xml/pref_main.xml
index 6409046f8..e768d1082 100644
--- a/app/src/main/res/xml/pref_main.xml
+++ b/app/src/main/res/xml/pref_main.xml
@@ -6,10 +6,9 @@
     <android.support.v7.preference.PreferenceCategory
 		android:title="@string/mcl_setting_category_general">
 		
-        <android.support.v7.preference.SeekBarPreference
-            android:key="maxDxRefs"
-            android:title="@string/mcl_setting_title_setmaxdxref"
-            android:summary="@string/mcl_setting_subtitle_setmaxdxref" />
+        <net.kdt.pojavlaunch.prefs.UninstallJREDialogPreference
+            android:title="@string/mcl_setting_title_uninstalljre"
+            android:summary="@string/mcl_setting_subtitle_uninstalljre" />
 		
         <android.support.v7.preference.SeekBarPreference
             android:key="timeLongPressTrigger"