In a quick test, that doesn’t seem to be a problem here.
Have you tested to see if this is limited to Grasshopper definitions with AC-GH connection components? Or even when 3rd party plug-ins have been removed?
-wim
I’ve never used Archicad.
When I wrote that I didn’t experience any problems, I tested opening a simple Grasshopper file directly for Windows Explorer. That Grasshopper file only had default components, which is why I asked if you had tested this without AC-GH connection components.
Based on your eMail address, it looks like you are in a perfect position to get help from your colleagues who developed this plug-in.
-wim