we're using Resolume 5.0.1. We have no picture a the preview Monitor and the Output Monitor in the software window. It shows sometimes the Desktop lying behind the software window or it is only black. We had the same error in Resolume 4 sometimes.
The outputs over HDMI, DVI and SDI are working normally.
After a call to the Resolume-Support I deactivated Windows Aero Desktop Theme, but this doesn't help. Same problem here.
Some information about the used PC:
AMD FX9370 Processor
16GB RAM
AMD Radeon R9 200 graphics card
Blackmagic DeckLink Duo 4K pro
Blackmagic MiniRecorder HDMI/SDI
Windows 7 Professional 64bit
If you know the problem or can give me some hints what I can try to solve this, i would be happy to hear from you

Thanks
Best regards
Stefan Thönes