1 Back up workbooks.
Please input below in the address bar of file explorer and hit the enter key.
Please find workbooks and backup it. Please force quit XMind 2020 via Task Manager.
2 Uninstall XMind.
Please go to local disk C> Program Files>XMind or XMind ZEN, find Uninstall XMind.exe, uninstall XMind.
3 Check local disk C> Program Files, if there is XMind ZEN file, please delate it. Then download XMind 2020 again.
If there is no XMind ZEN file, please download XMind 2020 again.
4 After you install XMind 2020, the file will be there when you relaunch XMind 2020.