The latest version for supported users is 12.0040
You can check which version you're currently running by looking in the main Herschel window:
You'll find a complete version history and installation tips at the bottom of this page, as well as an upgrade for your system.
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: