Wanted to download directly through Factorio, but can't because it doesn't have a version registered to it. Don't know if that's a quick fix or not but it would be appreciated!

I just downloaded it using the in-game browser and it worked. What Factorio version are you using? This mod is for 0.14 only.

Hmm let me double check version. I'm downloading through the client itself and it doesn't allow it there.

The current main build isn't 0.14, if you want to use the mod you need to use the experimental betas.