It appears that FKey Clipboard doesn't work with the current Win 10 Preview - specifically Windows 10 Home insider Preview
Evaluation copy. Build 16232.rs_prereleasre.170624-1334
Just a heads up. Not sure if the issue is with Windows or something that Marko will have to deal with when the new Win 10 release becomes public.
FYI - Regarding FastKey Clipboard Issue with Win 10 Insiders Preview
I could't reproduce the issue. What's the problem exactly?