Stalled at "Resolving Packages"

[WaywardMage]

I'm reporting an issue as well as my eventual solution in the hopes that anyone else with this problem will get directed here by Google. To be clear, this wasn't an issue with SuperSimple2DKit, but with how it was downloaded and extracted.

As it says in the subject, my "open" was stalled at "Resolving Packages". Turns out, after I downloaded and extracted the code, all of the files were flagged a read-only. Once I allowed write access, it started working.