leomon32 posted at 9:19 PM Sun, 3 December 2023 - #4478565

I noticed that Windows 11 came with a bunch of upgrades in that department. I guess I could uninstall them and check if it's still running afterward.

Leave the Windows Updates as they are. If you uninstall any of them (some don't give you an uninstall option) ... Windows will always install the latest version available for its libraries by itself. You can't win this fight! lol

What I was trying to suggest is: download and install .NET 3.5 Framework. Windows 11 has no use for it, it's deadwood. But other older programs seek and expect to find this version installed. This means the newer version of .NET Framework is not backwards compatible... or not fully compatible. New libraries with new sets of instructions which the old 3D programs don't understand and don't know how to deal with.