Arcane Raise offers 5 separate DLC (booster + 4 characters) that are not directly compatible with each other:
It is recommended that you ONLY purchase ONE of the DLCs above. However, if you purchase multiple DLCs, you will have to only select the one that you wish to use currently in Steam Client DLC Section and deselect the rest.
For more detailed steps please read this guide:
http://steamcommunity.com/sharedfiles/filedetails/?id=875951424