Hi Daniel,
thanks for catching up so quickly!
I am on Version 7 SR26
(7.26.23009.7001, 2023-01-09)
I have tried with many files, none have worked yet. These I tried (squishycurves and kangaroo_Test2 are not from Github)

The others in that folder do work (squishycurves and kangaroo_Test2) I just downloaded something to test from here: CurveCollide: getting duplicate polygons in Kangaroo solution - #4 by lauren1
I do get one error on startup related to scarab (legacy maxwell material plugin)
don’t think that matters though…
Command: Grasshopper
An error occured during GHA assembly loading:
Path: C:\Users***\AppData\Roaming\Grasshopper\Libraries\Scarab.gha
Exception System.IO.FileNotFoundException:
Message: Could not load file or assembly ‘Maxwell, Version=3.0.0.0, Culture=neutral, PublicKeyToken=0c67436bca449732’ or one of its dependencies. The system cannot find the file specified.
and yes, I can see the Kangaroo2 tab, and I also have legacy Kangaroo installed: