I have a small problem when retouching with Helicon - the Use another output as a source option is missing from time to time. I suspect it's due to enabling Use OpenCL hardware acceleration option. Disabling and enabling the option, makes the option available but then it's gone when using Helicon again. And so on...
I'm not that bothered with it since the software runs already very fast but I think there is a small problem!
My video card is Nvidia GeForce GTX 960 with latest drivers, btw.
Cristian