OK, I will delete those files, but when responding to your request for copies of the offending files, I looked more closely at the information I had and found they were actually generated back in January by the original Photo Mechanic before I updated to the Plus version, and there have been no new ones since (but of course the old ones continue to take up half the available disk space on the fast boot drive). I assume these log files are generated when there is some form of system disruption, and since the middle of last year I have been experiencing occasional system freezes. Keeping track of what I had running when Windows froze, I have always had one or both of Photo Mechanic (both original or Plus) and Lotus Notes open. Lotus Notes is an old program, from about 15 years ago, and I suspect this is the culprit. Unfortunately, IBM purchased the Lotus operations and has shown no interest in updating what used to be world-class software.
Now, as for the zip file, I opened the basic PM program and followed your instructions. After about 10 minutes it returned an error message saying it could not generate the file. Trying a standard zip program on the 1st file, it also returns an error message stating the .log file is too large, so I suppose we are at a dead end here.
Thanks for your help. I'll just delete the .log files and proceed with my work.