Step 1 - Go to https://LegalFormsGenerator.com/login and log in. 

Step 2 - Click here to manage your subscription.

Depending on if you originally paid using PayPal or a credit card (via authorize.net) you'll be show the appropriate information if you are logged into https://LegalFormsGenerator.com

If you are using the "Link" version, you'll need to update all your sites with the "HTML" or "Text" version of the legal forms.