Finally I got Xirus back in my Rhino. It was a similar problem I’ve been having (regurarly) with T-Splines and Vray. I had to delete ‘XirusWip’ and ‘XirusWIP.rui’ from the settings folder: C:\Users\Johnny\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\Xirus WIP (8d7f6c38-3803-46ce-b493-f3178c532945)/settings, and open Rhino again.
…BUT I still can’t see Xirus toolbar anywere, even the word ‘Xirus’ in now visible in the upper menu bar (and working).
How to get the visual toolbar back as well?