Have you tried right clicking on the email add in the launcher and logging out and in again.
Might be worth a try.
Done that and it's still requesting download after reauthorising. Seems to have deleted my old install.
Still, every cloud and all that. Its meant that at last I can get the install files onto my games drive and not my C: drive. I didn't read the install instructions when first installing and it's been bugging me that they are on my C: drive
40% done... I may get an hour in before 'lunch' ends... ah I love working from home