When I installed TRS2009 and TRS2010. desktop shortcuts were created automatically. The one for 2009 is labelled 'launch Trainz' whereas that for TRS2010 is labelled 'launch 2010'.
I suggest going to your program files and finding 2009 and 2010 and creating new shortcuts, perhaps one at a time, and renaming them to show which is which, if necessary.
By the way, my 2010 is installed in the Auran folder, whereas 2009 has its own - again this happened automatically on installing.
Ray