1 Back up workbooks.
Please input below in the address bar of file explorer and hit the enter key.
%HOMEPATH%\AppData\Roaming\XMind\Electron v3\vana
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.