Lightroom not loading (even after uninstall and reinstall)

Hi Adobe Community, 

I'm unable to use Lightroom, even after I tried un-installing and re-installing it. When I try re-opening it, it just "loads" for hours. I've checked to make sure it's updated, and that my account is paid for, etc. This puts me in a sticky situation as I'm trying to process some photos for a presentation, not to mention how much the monthy fees are!

Any help or pointers would be greatly appreciated. 

Many thanks, 

Rachel