Hey Steve,

We can assist you to upgrade your site Payplans to 4.0 for your current licensed domains, can you update your site backend and FTP access at http://stackideas.com/dashboard/site ?

Before we perform anything on your site, you have check following things :

1. Do the full backup on the site

2. If there got any customisation in Payplans core file, you have to share with us which file you have modified is because when you perform an upgrade to 4.0, all these customisation work will be gone.

3. Need to read through this transition docs https://stackideas.com/docs/payplans/administrators/welcome/transition-to-payplans-4