Help a N00b out...

I just downloaded Forge for all my MtG needs. However, it seems that none of the card images have loaded into the program. They all show as a sort of generic Plains card. Do I need to separately download the card images for use in the program? If so, where could those downloads be found? The descriptions for the cards show up just fine, only the the images themselves are absent. Any help would be appreciated.
-PackRat
-PackRat