When it closes, do you get the following dialog:

If so, please put "For Orlando, from Dellen3" the next time it happens and let me know here to go look for it.

In general, we see crashes and shut downs for a few reasons.

• Impartial updates.  Sometimes an anti-virus or backup software will lock a file, preventing an update to that file. The rest of the files get updated, and then things are out of sync.  If things are suddenly going awry after an update, try Start Menu, ProSeries 2020 -> Tools Repair Updates. This seems to be the most common cause for sudden issues.
• Windows Problems.  We rely on a lot of windows code.. sometimes it fails for certain people who are on certain patches/updates.  Updating windows might work, but it is often unfortunately a guessing game.
• Antivirus Problems.  Suddenly AntiVirus will remove an executable or quarantine a file, causing things to break.  Exempting ProSeries directories from scans and/or whitelisting them often helps.
• Code Problems.  Unfortunately ProSeries is millions of lines of code.. that depends on probably billions of lines of code from other Intuit teams, Microsoft and other companies.  As things get reported we triage based on severity and frequency across customers.   The more detail you can provide in the reporting mechanism, the better chance we can have at reproducing the issue.  I can say with certainty we don't knowingly release crashes / issues like this .. and when they happen, they are usually exceedingly difficult to reproduce since they often depend on specific machine environments or complex return types.