It's not possible that just activating GSX from Trial would cause a crash so no, the crash must be caused by something else. Maybe you tried it on an airport you could't use in Trial, and if this an airport has some kind of bug, it can cause an error.
Of course, is difficult to say, with a so vague description of the problem. Do you have some errors ? Have you seen a request to open the error log ? If yes, have you opened it ? What did it say ?