Collectible Card Game Headquarters

How are we supposed to know which cards go where? Lots of the folders wind up empty and other than searching for a card (nonexistent in that case) by name or having a list of which folders correspond to which set codes, I know of no way to figure this out.

E.g., Portal is POR, what is it in Forge?

Is there a list somewhere? That might be a good thing to include with the download.

The in-game downloader places the LQ set pics in the right folder automatically. The downloader for non-set LQ pics doesn't need to separate the pics into set folders.