Slitherine

I've been playing OOB free Boot Camp on my PC. I just bought a bunch of expansion packs and downloaded them but they won't install because the installer says:

"Setup has detected that you do not have Order of Battle - WWII Installed. Please install Order of Battle - WWII before installing this Expansion."

I have it installed but the installer is not recognizing it. I tried downloading it again from Slitherine's website but it won't download. HELP! How do I fix this???

With Steam, there is no such concern for the installation, it’s like you have a PC game console.