I just downloaded this program, I want to build a deck, but I only want to see the cards from certain sets, not all of them. The card filter doesn't seem to work at all, I guess it was built with magic in mind. Is there any way to do this?

Have you been using the card filter? That might be why you're only seeing certain sets. If you reload the master base it should fix it. If for some reason you don't have all the sets added:

1. Go to View -> Library Mode
2. Click in the top half and go to File -> Open Library -> (whatever your master base is called)
3. Click in the bottom half and go to File -> Open Library -> Custom Sets -> (name of a set that's not in the master base)
4. Highlight everything in the bottom half, copy, go to the top half, paste.
5. Save

You can use the "Simple (apprentice like) card filter" in View to search cards. It's not 100% reliable, but the "Type" line is where you can search for team affiliationsm "Plot Twist", "Location", or "Equipment. I'm not sure if it picks up multiple. And then the other lines are more obvious such as text or cost.

I have 4252 cards which may or may not be all of them. I haven't played in 4 years, so I want to start with the 3 sets I am familiar with, and then build up from there. I want to make it where it only shows me the sets I want, and not every card.