YMMV. This may or it may not help with your Enclave crashing problem.

Enclave was crashing randomly and quite regularly under Windows 7 home premium 64bit. Setting affinity to a single core; swapping sound card; loading the latest ATI video driver made no difference. Changing VID_RENDER in Enclave's environment.cfg from Direct3D8 to OpenGL stabilize the game. The modified entry read like:

VID_RENDER=OpenGL