Yes, DX said a newer version was already installed, I can't remember what the other one said - but I'll have a stab at reinstalling them just to be absolutely certain.
I extracted it to E:\Installations\BanishedKit\, and did copy those four files ^^ I also tried C:\Banishedkit just in case it didn't like the custom location, but it didn't make a difference.
ETA: C++ came up with the option to repair or uninstall, tried repair to make sure it wasn't corrupted, didn't help. Not sure if vcredist_arm is super crucial? Because I'm not sure what that one is for, but it says it's not a valid application when I try to run it, and I downloaded it twice in case it corrupted the first time