Although it could be a DirectX issue, as @VerMishelb explained, I find it very weird that the stand-alone works, but Steam does not (because all DirectX stuff is common between the two). Did you actually try the stand-alone version recently (with your new graphics card)? Download v.105 to make sure it still works: ⬇ Download CIU
Also, in the same folder where you found the .log file, there should also be a minidump file (it ends in .mdmp). Send it to me in a personal message here, or in an e-mail to support@interactionstudios.com and I’ll look into it.