I am interested in learning how to download the free bryce 7 pro without the learning edition copyright restrictions.
Download it from here, you will find a readme with the download which gives you the bryce7 pro serial number. THen just change the serial number on your PLE edition, no need to reinstall. It is the serial number that unlocks the disabled fucntions in the PLE version.
ANother way of getting a Pro serial number is to use the "help" button at the top of the page and go to "The Knowledge Base"