I have never in my 10 years+ of doing support for the Compu series of software and dongles ever seen a computer re-boot cause of the program. The program would either crash or just not want to run.
I think maybe you have a much bigger issues on the computer somewhere. Does it close with a Blue Screen and a error code or message?
Random computer re-boots is usually hardware failure somewhere, CPU, Cpu Fan, RAM, Hard drive freaking out, etc.