MicroStation Crashes

We have a user whose MicroStation installation has been corrupted somehow. The last time he used it successfully was 1/16/2019. He tried to get in it today and the program keeps crashing. The installation is on a Mac, in Parallels. Since last Wednesday, he installed AutoCAD for Mac (i.e. not on the Parallels side). Does anyone know how to figure out what's going on?