is the “_” implemented if you download and reinstall the update?
I was able to use Hermod as a usb device with Ableton Live 9 in Windows 10, but not on Windows 8.1 (it wouldn’t even recognize the device). Had to downgrade, since I work mainly on the latter one.
The firmware will be soon updated (next week) with the reported bug fixed (some HOST devices does not work with Hermod USB device, and the issue with a project “_” save).
In the meantime, you can send us an email at contact(at)squarp(dot)net to get the beta firmware with the fixes, if you want to try it!