If you downloaded DisplayFusion 12.0 and are having issues with languages please re-download and re-install. We have repacked the release as 12.0c with the languages fixed.
I just bought Display Fusion PRO, moslty for the second taskbar functions, but it turns black when Open shell is enabled under Windows 10. It seems like there was Open Shell support in the past. Has it been disconinued? Task bar also doesn't auto hide on secon monitor. Please see attached photo.