You'll have an email like this, titled "Complete your registration..."

Click the button to complete the setup of your affiliate account.

Clicking the button will activate your account and have your temporary password emailed to you. This screen is simply a confirmation that your temporary password has been sent. 

Click "Go back" to return to the Log In screen.

Head back to your email to get "Your new password"

ThriveCart
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ThriveCart: Your new password

Head back to the sign in page, put in your email address and paste your password... then press "Sign In".

Find your profile in the top right corner of your affiliate dashboard.

Scroll to the bottom and click "Change my password"

Enter the new password you wish to use to access your affiliate dashboard.

Affiliate Dashboard Activation and Setup Complete

How to Activate Your Affiliate Account and Set Your Password