Views Support: You can make views with the new view type, License Key.
Views Bulk Operation Support: You can modify license keys with VBO.
License keys now displayed on the Order admin page as well as the user's Order page.
SimpleTest Support: You can run functional and performance tests.
API: You no longer need to use the simple license key add page. You can create your own license key generator module that plugs into uc_license_keys. See README.txt.
Upgrade from Drupal 5
Run the appropriate update in update.php. Does not require any module to be enabled.
Performance Note
Add an index to the uc_products.model column (ubercart) for improved performance when you have many license keys for large values of many.
Changelog
API: hook_uc_license_keys_import -- see README.txt
Admin form improved.
Added new hook_audiofield_players()
Players can now be stored anywhere in the folder structure and other modules can extend players support.