Thanks for the quick turnaround. Didn't realize there was an alternative backup suffix. Don't recall seeing the option but then again I've been using PWS for years.
Had the number of backups set to 999. Currently have 50 in the directory. The most recent backup from after the crash is numbered "blahblah_001.ibak". The previous backups in the directory run from "blahblah_954.ibak" through "blahblah_999.ibak". Did some additional testing. It looks like the backups are overwriting the "blahblah_001.ibak" file if I make one change or 5 (could be more but didn't test further) rather than incrementing to ...002.ibak, etc. Moving all iback files to another directory...
pwsafe64-3.56.0 crash when making many un-applied edits to existing entry