So: there was some weird issue with my new (and temporary) laptop, where on a reboot, it was trying to sign me in as some user that didn't exist any more. So I did a full reset of it, reinstall of Windows 10 and all that.
I was hoping that something that simple would just fix the issue, especially since Mafia was originally working (briefly) when I first got the laptop home yesterday. But no such luck.
Also, thank you to all who have tried to help so far, your assistance is greatly appreciated, even if the problem isn't yet solved.
- Creating a new empty folder with only the .jar file in it, and attempting to run it gives an identical screenshot to the one above (with different folder name, of course).
--- Running it in the empty folder creates four new folders: "images", "scripts" (both are empty folders), "settings" (which contains a 0-byte text file GLOBAL_prefs.txt, and "relay" (which has all of these files http://i.imgur.com/8Xarchm.png )
- Creating c:\kolmafia and sticking my .jar file in there did mostly nothing, which seems to be a result of not having the permissions to write or something? Doing it into an empty folder gave a string of about 15 of these type of errors. I directly copied my pre-existing (and previously-working) Mafia files into that folder, just to get it trimmed down to something that would fit in a single screenshot: http://i.imgur.com/25vYGTr.png
- My previous two laptops both had the same User name, exclamation point and all, and neither one had any issue with running Mafia. I don't know if that would be the cause of any problem here, but by the time your response was posted, I was already knee-deep in the re-install process, so I couldn't confirm that with a lack of !.