More Clear Instructions on Pro Usage

I signed up for the pro plan on my phone but then when I visited the app on my Mac it was not clear what I supposed to do to activate it from another browser given that there is no authentication system.

I finally discovered I could click “Pro” and “Show License Key” but that’s not very obvious. I think when you sign up, it should send a welcome email with your key and some instructions on how to use your license key.