Quote: "In short, Where is the purchased folder in the fpsc main folder?"
The purchased folder is created by the store, and your downloads are placed in it. If you told the store to put them somewhere else, then it did not make a "purchased folder" in your FPS Creator directory.
Normally (I you had not redirected the downloads) the purchased folders would be under the main categories: entitybank, segments, texturebank, etc. At this point, I have no idea what you downloaded or where to put it.
Go back and undo what you did, then download them again.
Brian.