Help?

Hi - I spent many happy hours playing the core game and then downloaded the update and the The White March DLC from the app store. After installing I took a quick look around and then saved and exited. The next time I tried to open the game, this message appeared: “PillarsOfEternity is damaged and can’t be opened. Delete “PillarsOfEternity” and download it again from the App Store.” Does this mean that I will have to delete the entire game and lose all of my levelled characters and completed quests? Thanks for any advice.

Blues_Librarian about Pillars of Eternity