Please read the product support plan..
If you have an older version, and you purchased it more than a year ago, you can get a new key, but you will not get a new update.
IMPORTANT : There may be compatibility problems with earlier versions of Texture remapper and R15 or greater. If you purchased your license less than a year ago, you can get a free update by contacting support and providing a purchase ID or ref#
If you are in the second year of your license you can get a discount on a license renewal. Contact support for further details.