In that case, it sounds like the issue has to do with the game itself rather than a specific map. Have you tried re-installing without downloading a separate FH application for it? Some people find that operating with two separate FH applications downloaded at the same time can cause problems, so while it can be of assistance when you need to check something out and don't want to reinstall the game completely, it could end up being a bit problematic later on down the road.
My advice would be to uninstall all versions of the game completely (saving files such as presets, screenshots, heightmaps, etc), saving as much as you can, but understand that the problem you're having could be something that won't be fixed if you simply save all of the map files that you're working on if the issue is stemming from the files you're trying to save-- in order for things to resolve, the fix may be to start from a clean slate. It's a bit hard to tell exactly what is causing the problem, but that is probably your best way to resolve your situation.~