I am having the same problem. I just purchase My DMX 3.0, downloaded the latest PC version (April 2019) and it is crashing all the time also. I have about 7 different fixtures programmed and every time I added a fixture it would crash. Now I have a Show File that I can open but when I attempt to edit the file the software crashes. I have tried the software on different laptops each with 16 gb of RAM and at least 4gb of Video memory. Anybody else have this issue and solved the problem?