Hi,
While I posted a new discussion about Designer 10 (just upgraded from Designer ES2), in the Adobe ADEP forum, I am adding the link here in the hope that it may create additional discussion and solutions. The issue probably revolves around how to correctly set up and use certificates for XML form data encryption/decryption.
Here's the link: http://forums.adobe.com/message/4044212#4044212
Happy Holidays!
Regards,
saratogacoach