The case width, height, and spine width can now be edited in AudioLabel version 5.00 (in the 'Edit Dimensions' dialog). There are many other new features including LightScribe and Blu-ray case support.
The Registered version of AudioLabel 5.00 is available for download or upgrade using the same download link that was emailed to you after purchase.
The Trial version of AudioLabel 5.00 is available to everyone and can be found on the main Download page on the AudioLabel website.
Please let me know if you have any other questions.