You need to download LÖVE 0.8.0, which can be found here: https://bitbucket.org/rude/love/downloads
For some mods, you may need LÖVE 0.9.0 (it should be stated in the thread if it needs 0.9.0), which can be downloaded from the main site here: https://love2d.org/
I recommend using different installation paths for both, that way you can have both installed if you ever need them.
Also, welcome to the forums! We hope you enjoy you're stay. :)