Actually, I had to re-setup my trays and toolbars after the update (Windows). No biggie though.
check with the macOS Disk Utility if you have formatted the concerned drive with the “APFS (Case-sensitive)” file system… which is prone to provoke issues in this area w/ applications not being aware of resp. compatible with this.
@SketchUp3D_de Thanks. Your post made me realise I hadn’t updated my system info, I have switched to Windows about a month ago 
Apologies!