I contacted support via the phone. They ask that i remove all the qb installs. download a new installer for each pc and run it.

What benefit does a trial install do?

Yesterday 11/10/20 a tech had me open a trial company file. It opened and closed w/o any problems. It's the main company file that might be causing the crashes. Today's tech hd me verify and rebuild data or company file. Some errors were found; not critical. We'll see if the rebuild fixes the crashing on three different computers.

thank you