Playing BTS with the latest HOF mod.
Windows XP (Vista can shampoo my crotch)

The mapfinder program opens and seems to function normally, but when I press ALT-M at the beginning of a new game, nothing happens.

I think that you have to change some settings to make it active.

edit: I just checked. Under the options menu, there are three HOF tabs. Click on HOF3 and you should see a check box for Map Finder at the top that is empty. Check this and give it a try.

The mapfinder program opens and seems to function normally, but when I press ALT-M at the beginning of a new game, nothing happens.

I think that you have to change some settings to make it active.

edit: I just checked. Under the options menu, there are three HOF tabs. Click on HOF3 and you should see a check box for Map Finder at the top that is empty. Check this and give it a try.Also, make sure the other Map Finder setting (paths and rule file) are set correctly. If you open the utility it should have asked to set them for you. Of course, you need to switch to the BTS or Warlords in the utility menu options so it will set them for those expansions, too.

Press Alt-X - if it terminates the process, you might have to update your .NET framework