I recently had a similar problem, except ZLOrigin would not load. Now that I have uninstalled ZLOrigin and ZClient, and they are working again, I wanted to play the sims 4, but I have to now re-download everything again.
I searched my filestructure for any kind of data, and I can't find anything for my sims 4 data! I don't want to have lost everything! Where might the game be installed?