As a general rule you can always upgrade osTicket or osTicket Awesome without doing staggered upgrades, unless your installation is super old, like, more than a decade old.
When you go from one major version to another (e.g. 1.11.x to 1.12.x or 1.14.x to 1.15x) the installer will perform a database upgrade. But that only takes a few seconds.
Even if you're applying a minor upgrade, however, I always recommend backing up your database before you do anything!
Hi,
Ran the upgrade over the weekend. All went well, from 1.14 to the latest 1.15, your instructions were flawless thanks. TBH I have not noticed any major functionality enhancements from 1.14.3 to 1.15.2 but I know there are various security improvements. So that will do.