For some older licenses, you will need to purchase an upgrade before you can install the latest version. Check your code here to get the information for your specific license, plus your customized link to either download the free update, or get upgrade pricing.
If you don't have a license code (for example, if you purchased your copy via the Mac App Store or Steam), you will need to get any free updates from the store managing your license. You can also purchase a new license directly from the
Nevercenter website.
Please email support@nevercenter.com if you have any questions!