TextEdit problem after inst. Catalina After installing Catalina, my in-built TextEdit doesn't work anymore, neither by clicking the icon nor from the application. It says
The application “TextEdit.app” is not open anymore.

Please advise me.
Thanks
The typical fix is to choose log out from the Apple menu when this happens. 

This closes out your work more cleanly than trying to force quit apps. Also, it has the benefit of forcing the OS to name any apps that are not responding or have work to be saved. 

Next, restart the os and possibly test making a new user account. Let us know how it goes...