Hi ! Back to MOS, 15 years later, I'm a bit rusty :)
Clean 3.13 install + iris (absolutely nothing else installed yet), I get the following message and couldn't find anything relevant in SnoopDos :

objc runtime: cannot find class MUIPopbutton

I couldn't find any MUI class named this way anywhere on the net :)
cheers & thanks so much for this new piece of s/w !

[ Edited by mahen 19.08.2020 - 23:28 ]