Open the installed standalone, run it, and enter your login info in there and that should get you going.
Another reason your login cold not be working is your DAW/Host connection is blocked. To fix this you can follow these directions:
(Windows Only) To manage the whitelist in the Windows Firewall, click Start, type firewall and click Windows Firewall. Click Allow a program or feature through Windows Firewall (or, if you’re using Windows 10, click Allow an app or feature through Windows Firewall).On the next screen, click Change settings, then untick the box next to your DAW/HOST to allow it. If you don't see your DAW/Host in the list try adding it with the Allow another app... button.