Scrivener hanging

On my iMac running Catalina today for the first time ever, Scrivener 3 stopped working: I couldn’t close two open files & couldn’t open the project I needed. Had to force quit — & did that 4 times, but couldn’t get it to work. I downloaded a fresh copy of the apple, but same thing happened. I’m running the same scrivener non my macPro laptop — no problem there. This is a major problem: I have to finish a large project on th iMac & need my scrivener. Any suggestions?

After force quitting & restarting another 1/2 dozen times, rebooting the computer serve;l times, it seems to be working okay again. If someone knows if this is a bug or quirk, please let us know.