Cant view operation properties screen in Turbocad/cam v3.5

I'm hoping someone may be able to help me with a problem I'm having. I've been using Turbocad v16.2 for some time now along with the cam package v3.5. When I create a cam routine, I can see the G Code, but can't open the Operation Properties screen to make adjustments to my routine. Has anyone had this problem? I tried re-installing the cam module, but that didn't help. Any suggestions would be appreciated. I'm hoping that I don't need to update, because this version does everything I need to do.