Surface Pro Pen does not work

Hi all,
has anyone manage to get this working on a surface pro? I have the generation 1 with Windows 8.1.
My pen does not work. I can touch and use hotkeys but there is no pen functionality. Is there something I am doing wrong? I went into settings and all the tablet options are selected…

Try disabling ‘Use Qt Wintab Support’ from Preferences>Display tab. And then close and restart Toon Boom Studio and see if the pen works.