Oh, that's interesting. Thanks for explaining! I'll switch this thread to "not a bug".
A note in https://wiki.kolmafia.us/index.php/Installation might help others avoid the same issue.
My issue is less "I can't run KoLMafia" and more "KoLMafia is apparently accessing unrelated folders". My first impression was that actual ransomware snuck its way into a release.
If this is a false positive, what legitimate reason would the program have to start scanning and accessing...