FortiClient Chrome Extension / Force incognito-Activation

Hi and Hello,

we've got some difficulties with the FortiClient Webfilter Chrome Extension. We want to force activate the extension in incognito mode. We compared 3 Clients but the reg key in:
HKCU\SOFTWARE\Google\Chrome\PreferenceMACs\Default\extensions.settings
...is vor every client different.
Is there a scheme for that?
or does anybody get the force activate to work?