Ok, here goes. Ever since I bought AMS through Steam, I've had 2 installs. Don't know if that's normal. 1 was called AMS Beta & the other Automobilista 1.31. The 1.31 is the build I stopped it at from updating.I left the AMS Beta stock except till recently, except for adding all the add on tracks from Automobilista 1.31. I started adding about a dozen mods to AMS Beta from here. The other day, I copied 4 mods from the other 1.31 & went to play the game & the rectangular Automobilista stayed on the desk top for 20? seconds & disappearred, it never started. I checked the files thru Steam, verify, & it added a few, but then the same thing. I took out the 4 mod files I had put in & it still won't start. I heard you can add a trace to the exe. file to see what the error is. I kept taking out folders one at a time & letting Steam replace them. One time It loaded, but strangely it showed only one track in the menu, never seen that before. Can anyone tell me how to add a trace to the game & where do you find the trace file for the results?? Any help would be very much appreciated. Thank You !!!!!!!!!!