SourGrape

Question answered, please delete. I would do itself but I don't see an option to delete my post.

You are correct. It did not show up under my programs/features, but when I looked it up all windows comes with the base version. Mystery solved. Norbyte even said on github that .NET 8+ is now required.

The issue I have with that fix is that I never had .NET installed on my PC, as far as I know. Why would I suddenly need it for the newest version of lslib? I have installed the old version of LSLIB (1.18.7) in the meantime and it's working fine.