Trouble Installing Sword Coast Stratagems

So I've tried installing this mod, but after I select the folder to install to, I get an error that pops up in MS DOS that says "setup stratagems_autoinstall.tp2 not found. Make sure you have unpacked the archive correctly and that you are not trying to run this file from an archive."

Any ideas what I'm doing wrong?

edit: Also, I'm running the Steam version of BGEE