I have the same issue and I tried to do the same to fix it. But my sims3 launcher does not show anything it remains only blue without a possibility to sign in and in game when chossing a world it wont allow me to sign in either. Yet it does work on the sims3 store and EA website. When I try to download something from the Sims3 store the launcher does ask me to sign in but it wont led me and just keeps asking to sign in again (no error message either just pops up again) which makes it unable to download anything from the store site. Has anyone found anything else that helped ?