I have found a fix. For those whos DLC has vanished.
find your dragon age folder, you may have saved it else where but this is how I find mine.
D:\Steam\steamapps\common\dragon age ultimate edition
Once your in there find the file that says REDIST should be near the bottom. In there run the file that says DAOU_UpdateAddinsXML_Steam, when that finishes run the other file called DAUServiceSetup_Steam. Start up your dragon age ultimate and hopefully everything should be working.