I've had to reinstall 2010 a few times, I now keep a zipped backup of 44088 clean fresh virgin default no addons. What I started doing was wait until bedtime, fire up the TS2010 patch and make sure it's running, then shut off the monitor and go to bed.
Grade crossings are weird anyway, I had a bunch of 3 track crossings with working gates and bells - but then I started hearing bells 10 miles away from the nearest one with no AI traffic running, so I took them all out until I find one without glitches. I get enough grief from this psychotic tracklaying tool without having to deal with other glitches, "Oh, you made that track so straight and now you want to make a switch or add track to the end? Here, let me help you by bending all the connecting sections to what I think is a proper transition curve!" If there was some way to get the blasted thing to let ME lay the track and just LEAVE IT ALONE I wouldn't need to constantly fiddle with the straightening tool - which bends it into even more improbable shapes half the time anyway. :'(