Prior to getting started, make sure you or your IT administrator whitelists *wickr.com and firstname.lastname@example.org. This will ensure successful and timely delivery of activation & verification emails.
Download and install the Wickr app from https://pro-download.wickr.com/
When first opening the Wickr Pro apps, you'll see a screen like this:
If you've been invited already, click the Sign In button and enter your email address:
If you've been sent an email like this, click the "Click here" links or enter the invitation code manually.
Create and confirm a password for your account.
You're in! You can now use Wickr Pro as everyone else is!
NOTE: To add (register) more devices to your account, you only need to use the "Sign In" option. Trying to register a second time will give you an "Invalid Invitation" error.