FAQ
Why does the extension keep asking me to sign in again? 
- Local extension data may be corrupted.
- You may be entering the wrong password type.
- Your browser may have cleared the extension storage.
Try signing in again first. If the problem continues, clear the extension data and add it again, or switch to the latest 5UF VPN app.
How to Clear Cache Issues (Windows)
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Close 5UF VPN completely
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Make sure the application is fully exited.
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Check the system tray and Task Manager to ensure no 5UF VPN processes are running.
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Navigate to the cache folder
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Open File Explorer and go to:
C:/Users/user/AppData/Roaming/com.top.wuf
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Important: Replace user with your own Windows username, as that folder represents your account.
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Delete all files inside this folder
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Select all files and folders inside com.top.wuf and delete them.
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This clears any cached data that may be causing issues.
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Restart 5UF VPN with administrator rights
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Right-click the 5UF VPN icon and choose Run as administrator.
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This ensures the app can rebuild its cache properly and avoids permission issues.
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✅ After this process, 5UF VPN should start fresh, without old cached data causing errors or slowdowns.
What to do if the Windows 5UF app cannot start or has cache issues
If the Windows version of 5UF APP does not respond, crashes, gets stuck, or fails to open, the cause is often damaged local cache data.
Recommended steps:
- Fully exit 5UF VPN and make sure no tray icon remains.
- Open
C:/Users/YourWindowsUsername/AppData/Roaming/com.top.wuf. - Delete the cached files in the
com.top.wuffolder. - Restart the computer.
- Right-click 5UF VPN and choose Run as Administrator.
If it still cannot start, contact support and provide your Windows version, device model, screenshot of the error, and the time when it happened.
If you are still using an older client, we recommend switching to the latest 5UF VPN app for better stability and compatibility.
