I installed dropbox on my Mac,
I tried to stop it from taking over from iCloud but i mistakenly gave it permissions to sync my downloads folder. Now it is asking me to upgrade (my dl folder is large). I only need to use dropbox for a few documents so don't want to upgrade.

I have signed out and uninstalled locally but i can't get rid of teh link in my account, see below. Any help would be greatly appreciated here!
Thanks,
Joe