Likewise, I don't see how this would be related to the WordPress SSO. It will redirect you to WordPress in some circumstances if your session has expired but that shouldn't be very often if you're using the site.
You can transfer your WordPress SSO Marketplace purchase to my website, this gives you access to downloads, billing and technical support all in one place.
Visit https://ipb.silvesterwebdesigns.com
Sign in or Register.
Go to https://ipb.silvesterwebdesigns.com/redeem-marketplace-keys/
Click redeem key and enter your product license key (available from https://invisioncommunity.com/marketplace/previous-purchases/ )
If your purchase is expired or nearing expiry, a renewal invoice will be generated for you.