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Yes! Previously I had looked in the textures\patterns folder in my installation and found nothing, but the one in the 3D-CoatV3 folder found in Documents had the corrupt user-defined curve pens (Guess I won't play with Curve too much anymore .-. ) After deleting them 3d-coat works like a charm :3

Yeah, I was able to run it for a while, I made one or two curve pens on one of the first days of using it, however I don't think I've done any since then. Found the key! Thank you, I think I prefer to use the beta version now. But, I think I've found the user made pen files in "C:\Users\{Username}\Documents\3D-CoatV3\textures\patterns" I deleted a few .curv files and their matching files with names that look familiar, I'll test it out later.

The crash still happens when I run without CUDA though. and my email was the first place I looked, I did find something interesting listed as DLC in my steam library for 3D-Coat, it said something like "3D-Coat Users License" but there was no way I could view it or even interact with it .-. Normally on steam games that have CD-Keys list the CD-Key and all the CD-Keys for any DLC on start-up, however it doesn't seem they've added anything like that for serials to the newly added 'software' library of steam.

I'm unable to edit my last post, however the V4 Beta version appears to run fine, I don't know how to get my serial number from the Steam version though D:

Sorry about that, I have an nvidia 9800 gtx+, when I first bought it I was running it normally however when I realized that it supported CUDA I started using it for hopefully improved performance, I didn't really notice a change though, not that I ever really had lag problems to begin with. I was suspecting the crash could be a lack of ram, but if this can be ran 32 bit fine then I see no reason 64 bit with 2gb of ram would be a problem. But here's a DxDiag.txt I will try out the more recent build, hopefully I will have more luck. DxDiag.txt

I've submitted this via the bug report already, however I figured why not post it here as well. I recently bought 3D-Coat via steam, the version I'm running is 3.7.18S I believe and I'm running it 64bit with DirectX and Cuda, however it says all that in the bug report. The crash happens almost instantly after starting up 3D-Coat, the bug report didn't exactly give the log much formatting but I made it a little bit more readable, personally I can't gather the source of the crash from the log, so any help will be appreciated. bug report.txt