To enable and update secure payment template updates:
  1. Log in to NetCommunity
  2. Navigate to Administration>Sites & Settings
  3. Under the Settings > Schedules tab, scroll down to the Secure payment template update area
  4. Check the box to Enable secure payment template updates, if it is not already marked
  5. Click Update Templates to run the updater
  6. Click Save at the top of this page
Note: you may need to refresh the page in order to see the status of the updater. The number of templates in the site will determine how long it takes for the updater to complete.
Note: the updater may complete successfully or it may complete with Exceptions. If it completes with Exceptions, but no issues arise with the payment page, you may ignore the Exceptions. 

Payment page for event registration or donation form is not showing the correct template