Genius EasyPen M406 in Harmony 15

My Genius EasyPen M406 works beautifully in Photoshop (pressure sensitivity and drawing).
In Toon Boom Harmony 15 the pen doesn’t work unless I deactivate the software (ioTablet) and even then the pressure doesn’t work.
I’ve checked and I’m using the latest driver.

Any suggestions? (other than buying a Wacom)