diff --git a/entry.js b/entry.js
index 60e2567..84f0f41 100644
--- a/entry.js
+++ b/entry.js
@@ -124,7 +124,11 @@ app.whenReady().then(() => {
     ipcMain.on('prefix-con', async () => {
         const result = await dialog.showOpenDialog({ properties: ['openDirectory'] });
         if(result.filePaths.length == 0) return;
-        mainWindow.webContents.send('change-prefix', { 'dir': result.filePaths[0] });
+        mainWindow.webContents.send('change-prefix', { 'type': 'change', 'dir': result.filePaths[0] });
+    });
+
+    ipcMain.on('prefix-reset', async () => {
+        mainWindow.webContents.send('change-prefix', { 'type': 'reset' });
     });
 
     ipcMain.on('prefix-changed', async () => {
diff --git a/public/html/settings.html b/public/html/settings.html
index 1fb5e96..21d67d2 100644
--- a/public/html/settings.html
+++ b/public/html/settings.html
@@ -116,6 +116,7 @@
                     <span id="setprefix">empty</span>
                     
                     <button class="button" id="prefixdir" i18id="ChangePrefix">Change Prefix</button>
+                    <button class="button" id="defprefix" i18id="DefPrefix">Reset</button>
                 </div>
 
                     <div class="selected-item">
diff --git a/src/ts/index.ts b/src/ts/index.ts
index fdf0309..a9b3213 100644
--- a/src/ts/index.ts
+++ b/src/ts/index.ts
@@ -61,7 +61,8 @@ $(() => {
     });
 
     ipcRenderer.on('change-prefix', (event: void, data: any) => {
-        PrefixSelector.set(data.dir);
+        if(data.type == 'change') PrefixSelector.set(data.dir);
+        if(data.type == 'reset') PrefixSelector.Default();
         LauncherUI.updateLauncherState();
         ipcRenderer.send('prefix-changed');
     });
diff --git a/src/ts/lib/PrefixSelector.ts b/src/ts/lib/PrefixSelector.ts
index 0248315..e96a439 100644
--- a/src/ts/lib/PrefixSelector.ts
+++ b/src/ts/lib/PrefixSelector.ts
@@ -19,7 +19,7 @@ export default class PrefixSelector
         } else if (fs.existsSync(path.join(location, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'globalgamemanagers'))) {
             const config = fs.readFileSync(path.join(location, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'globalgamemanagers'), { encoding: 'ascii' });
             const version = /([1-9]+\.[0-9]+\.[0-9]+)_[\d]+_[\d]+/.exec(config)![1];
-            
+
             LauncherLib.updateConfig('version', version);
             LauncherLib.updateConfig('prefix', location);
             this.prefix = location;
@@ -40,16 +40,24 @@ export default class PrefixSelector
 
         if (fs.existsSync(path.join(dp, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'Persistent'))) {
             const version = fs.readFileSync(path.join(dp, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'Persistent', 'ScriptVersion'), { encoding: 'UTF-8' }).toString();
-            console.log(version);
+            
+            LauncherLib.updateConfig('version', version);
+            LauncherLib.updateConfig('prefix', dp);
+            this.prefix = dp;
         } else if (fs.existsSync(path.join(dp, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'globalgamemanagers'))) {
             const config = fs.readFileSync(path.join(dp, 'drive_c', 'Program Files', 'Genshin Impact', 'GenshinImpact_Data', 'globalgamemanagers'), { encoding: 'ascii' });
             const version = /([1-9]+\.[0-9]+\.[0-9]+)_[\d]+_[\d]+/.exec(config)![1];
-            console.log(version);
+
+            LauncherLib.updateConfig('version', version);
+            LauncherLib.updateConfig('prefix', dp);
+            this.prefix = dp;
         } else {
             console.log('Game not found.');
 
             // Unset version if game is not found.
             LauncherLib.updateConfig('version', null);
+            LauncherLib.updateConfig('prefix', dp);
+            this.prefix = dp;
         }
     }
 
diff --git a/src/ts/settings.ts b/src/ts/settings.ts
index 3328ded..68db7b7 100644
--- a/src/ts/settings.ts
+++ b/src/ts/settings.ts
@@ -59,7 +59,7 @@ $(() => {
      */
 
     $('#prefixloc span').text(LauncherLib.getConfig('prefix'));
-    
+
     ipcRenderer.on('prefix-changed', () => {
         $('#prefixloc span').text(LauncherLib.getConfig('prefix'));
     })
@@ -68,6 +68,10 @@ $(() => {
         ipcRenderer.send('prefix-con');
     })
 
+    $('#prefixloc #defprefix').on('click', () => {
+        ipcRenderer.send('prefix-reset');
+    })
+
     /**
      * Game voice language
      */