I backed away from my TRS-19 North American Version, a year or so ago because of this problem.  I was/am still using Windows 7.  I would run a session for a while and then save it.  I would restart the saved session and run it until I got tired and then save it.  I might do this 10 or so times.  Then one day I'd restart the last saved session only to find my train was gone.  I could usually find it somewhere in a field or where ever with the cars all piled on top of one another.  If I reopened a previously saved session it had also been destroyed, all the way back to the original saved session.  This problem was reported but I never saw a "cause" or a "fix" although I was not the only one reporting this problem.  I finally just abandoned TRS19 and went back to TS2010, which to date has been my favorite version in spite of its "buggy" and very slow CMP.
				
			
			
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