Hi,
We just released mojoPortal 2.3.7.0 today, and we simultaneously released Form Wizard Pro 2.6.0.3 which is compatible. Just click the My Account link at the top of the page then go to Order History and from there you can always download the latest version of products you have purchased. You just happened to purchase it and download just prior to todays new release.
So you just need to re-download and install Form Wizard Pro and it should solve it.
Hope that helps,
Joe