Elysium-Official updated to version 3.0.0
Added Antique Atlas
Added Antique Atlas Extras
Deleted Selims Enchants
Deleted FTB Utilities
Type in the modpack name (Elysium-Official) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Elysium-Official from the list on the left. The launcher will handle everything else!