I have the same problem (windows 10 latest / excel 2007 / cursor fx 4 beta).
When you highlight a cell to for example copy and paste, right click it and no right click menu appears.
All that happens is the cursor shows.
When using the default windows cursor everything works fine but changing to a different cursor makes right clicking impossible.
Sorry to hear you are having issues. I can't reproduce your issue on my system. But I am using Office 365.
I have forwarded your questions/problems to the Stardock Support team for their assistance. Please keep an eye on this thread for any updates. We appreciate you feedback and patience.
Stardock Community Assistant.