Opus Start by double click on desktop stopped working

Opus11 desktop double click stopped working on Win10- suspect it is related to Win10 update as nothing changed overnight except that. Opus settings are still double click enabled, and I tried disabling and re-enabling it. I am running Win10 UAC off (verified), Opus as Administrator (verified- "Administrator:" at top of screen and Admin tab greyed out). I can open directories in Opus without a UAC prompt by right click folder and select "Open in Directory Opus". I run the same Opus on the same machine in WinXP under VMWare, and it still works properly- it will open Opus by double clicking machine.

That sounds more like UAC is enabled in Windows and you have run dopus.exe elevated. Are you sure you aren't doing that?

Could you post a screenshot of the window?