I'm not sure if this is possible as I believe the only way to encrypt the form is at PayPal... however, it would be nice to encrypt the <form> so crawlers don't get your email address.
It is possible to encrypt, but would require restructuring and would result in added complexity for users, as well as complicating/restricting program options.
This release was aimed at reducing complexity, so I shall experiment
Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):