Thank you for your response. You are right about price, I also purchased some add on's. Your suggestions didn't work but I noticed Windows 10 wasn't listed in compatible programs. I also have same program on older computer using windows p pro andit works perfect. I have narrowed problem down to the fact that the only midi programs that crash the program have sysex messages in them. If the program doesn't have any sysex messages then it works. Are you aware of any changes I can make in Windows 10 to allow outside sysex messages to be received? Sent question to microsoft and never got an answer. thanks for any suggestions.

rewind940