NEC V 4.0 Activity Editing

I recently downloaded the NEC V 4 but I'm not able to edit or create activities on the route. The program freezes and locks up as soon as I start or open a project on the route. Any suggestions on how to fix this problem?

Sorry wish I could help but I don't have the NEC 4. I think you'll find more knowledgeable train sim trouble shooters over at the train-sim.com forum. Good luck