I'm skeptical that PM's are working properly; all my replies end up in "Outbox" instead of "Sent." Lunacy, I hope the recompiled version will work for you.
If you want to give it a try, the software and data from
http://12parsecs.engineering/T37.zipIt's a 4 GB file, which is mostly the attached images. Unzip the whole package, then you should be able to run T37ForumScraper.exe. It will look for all the data in the same directory where it is.
Let me know if it works. My first attempt was for Windows 10 only. I recompiled yesterday with an older version of Python so this version should work with Windows 7 or 8 also.
To download new posts, you need Firefox installed and to put your login username and password on the text file
credentials.txt. Then the Scrape button will open a Firefox window and look for new messages. It's slow, especially with attached pictures that take about a minute each. So just let it run.