Well I think I spoke way too soon this morning. Now that I have tried to run a couple of routes, I find that TS12 is now riddled with bugs, crashes, inability to use Raildriver with steam engines despite loading latest RD software for SP1, and I have watched the data base repair run at least 4 times because it locks up when trying to download content updates in Trainz.. A couple of routes won't run at all, one loads in mid air, it's just a hodge podge of confusion. I probably will try and roll it back with system restore, and if that doesn't work, uninstall the game and chalk it up to experience. . Not worth the headache.