Sonar x1d - export audio crash

I'm using Sonar Producer Expanded (x64) and recently updated to X1d. 
When I try to export Audio, Sonar just crashes. It asks if I want to send in a crashdump so at least the error handling is working...
Even the simplest project with just 2 seconds of audio and no FX's crashes.

I reverted to X1c through "System Restore" (the best thing ever invented) and everything works fine.

Any ideas?