ACC Release 6 is out and fortunately for Fanatec owners you can now disable the Fanatec native support in the game settings to enjoy your display/led with SLIMax Manager Pro.
Unfortunately, the release 6 of ACC contains a bug in max rpm engine value which seems to be hard-coded to 9000rpm but the current cars not exceed 7700rpm, so I created several basic SLIMax setups for ACC to workaround this issue.
The new version of SLIMax Mgr v184.108.40.206 is required to get the updates
Select menu “Check For Update” to get the latest plugins
and hit the button “Download And Install All“.
More Info on ACC Plugin page, HERE.