Download the latest version of Mods for HESK along with any language packs.
The latest version of HESK is 2.8.5, but Mods for HESK only supports HESK 2.8.4.
A future version of Mods for HESK will be released to support HESK 2.8.5.
Answer this simple question to retrieve installation information.
http://<path to your helpdesk>/install, click "Install / Upgrade Mods for HESK", and then follow the on-screen instructions.