mainstage 2.2.2 addtional content wont download.

I have the old Logic 8 and the new mainstage 2.2.2 that was downloaded from the app store recently. I've managed to download all of mainstage apart from the addtional content. Everytime I open Mianstage it asks me if I want to download this but It freezes downloading at 296mb and says it wasnt able to complete download. Firstly whats on the additional content? and how can I download it?