I hate to be a nuisance from day one but I've installed and reinstalled the program and turned off my Firewall and antivirus but it still won't open up with any of the four options. I have Windows 10 so I waited and used the Start menu to try each. It just gives a "Can't open log file." !!Crash!!.log response for all of them. I have an AMD Radeon R9 200 series with 3 Gigs and 16 gigs of main ram. I just updated to Radeon Crimson 15.112 so it's OpenGL 6.14.10 and OpenCL 184.108.40.206, if that helps. Again, I just bought the program and am unable to launch it even once. I contacted support and Andrew suggested this but it made no difference. With the time change it may be a while before he can get back to me again. "Please delete folder MyDocuments/3D-CoatV45/ Possibly some files got corrupted there so it crashes. Try no-CUDA version." The only file in that folder was a single xml. I deleted the folder as suggested. It still crashes with same error trying both no-Cuda. Even tried CUDA again but same. I can't find a log file anywhere either. Please note that I did install the 64 bit program on my E: drive, not the C:, but I do this with all other programs without any problem most of the time. Any help appreciated.