Flem Clone said:

I feel a bit foolish because of the question that I'm about to ask, but here it goes...

I went to tehparadox and downloaded all of the RAR files for the MKV version. The extraction process doesn't work. 7-Zip says something about file corruption. So, I wanna go the Jdownloader route. But, I don't know where to begin. Do I have to be sent the link to the download?

Did you check your file sizes? All parts (except for the last one) should be identical in size. Any part that's a different size needs to be re-downloaded. This happened to me when I was downloading the Star Wars Despecialized Edition.