I own most of the Soundtoys plug ins and the last time I upgraded I had to set up an account. I had the same issue you're having regardless of browser. Shoot them a support email and they'll sort you out.
Are you sure you are logged in on your SoundToys.com account?
You have to make one and than you recieve an email.
next step is:
https://www.soundtoys.com/sxswpromo/&rc=233-7644-912