If the Red Giant Application Manager (RGA) is not letting you sign in, it's usually because:

• RGA needs to be reinstalled with its latest installer: Mac / Win
  • This option should be tried even if RGA says it's currently up-to-date.
• You are behind a firewall
  
  • You'll need to configure your firewall to allow RGA to accept incoming/outgoing connections. Consult with your firewall's documentation for steps on how to do this.

Related FAQs:

• My plugins are appearing in After Effects, but not Premiere