The latest version of Herschel for all users is 12.0038
You can check which version you're currently running by looking in the main Herschel window:
You'll find a complete version history at the bottom of this page, as well as a download to upgrade your system to version 12.0038 and some installation tips.
Once you've downloaded the upgrade, and when nobody is using Herschel, run the upgrade program Herschel_v12_Upgrade.exe and follow the straightforward on-screen instructions.
Windows may warn you about starting an unrecognised app. To continue with the upgrade, click here:
Then click here: