Upgrade Protection provides you with access to the upgrade system for 12 months.
Valid Upgrade Protection is required for General and Business Premium Support.
Regardless of 'point-release' you get a minimum of 12 months Upgrade Protection starting when your Key was issued and as indicated on the Help | About Mailtraq panel.
Thereafter, upgrading costs ~30% of the current list price of the edition you are upgrading.
You then have upgrade protection for a further 12 months, starting from the date of purchasing the upgrade.
You can buy multiple years of Upgrade protection at any time - locking in the current price.
Find out how to check your current Upgrade Protection status here.
Find out about recent Builds here
This means that, whilst you have a 'perpetual' license that will remain valid for ever, you can keep up to date with improvements and new features by paying just 30% of the current list price each year.
If your upgrade protection lapses, you will still be able to re-download any builds you have already downloaded.
Find out how to renew your Upgrade Protection here