Upgrading Overview

At a high-level, the steps are,

1. Back up your database and files
2. Back up your custom code, if any
3. Get the release you want to upgrade to; The latest release may be found here
4. Replace the current LORIS install
5. Your custom code and the newer release may not work without some work, reading the notes that come with the release will help
6. Look for the SQL/Release_patches folder and apply the necessary .sql patches, in the correct order
7. Look for additional patch instructions that come with the release notes

16.X to 17.0

Instructions may be found here

17.0 to 17.1

Instructions may be found here