Right click button failure after registry clean

Hi, after running registry cleanning, every time I click right button on file manager, it crashes and menu doesn't appear. I didn't backup registries so can't fix the problem on Windows 10 (1909). Could You help me?

If you changed Windows 10 default behavior (default is to have System Restore/System Protection turned off) and either turned on/enabled System Protection or even if you manually and regularly make a Restore Point on your own that's another avenue to undo the damage since Restore Points can also restore the registry undoing damage.

Since you're on Windows 10 it's recommended that you completely abandon cleaning the registry. Microsoft recommends not using registry cleaners, as seen here:

https://support.microsoft.com/en-us/help/2563254/microsoft-support-policy-for-the-use-of-registry-cleaning-utilities

Do you mean the built in file explorer or the file manager app? Is your right click working everywhere else? Have you tried a different mouse?

Mouse buttons do wear out, my right click is becoming erratic at the moment. (Time to take the mouse apart and try to fix it, or get a new mouse).