Can't open studio even after deleting the registry keys and uninstalling

Try updating studio if you can, If you can’t, try these methods [May not work]:

  1. Try mod manager on different channels (Mod manager is in github and forum, Roblox Studio Mod Manager)

  2. Try launching studio from the start menu, should update it.

  3. Visit that url, a black screen with text should appear, read what it says and reply back. if it downloads something and closes, that means it worked and you need to launch it.

  4. Final method, uninstall and re-install studio. Or just contact support.