FM 4.5.5 libraries and Lightroom 6 (LR6)?

FM Libraries does not show my Lightroom 6 (LR6) catalog, even though I have ticked Lightroom in preferences. Instead, it shows the old Lightroom 5 catalog. While reloading the LR library link, it still points to the LR5 catalog. Suggestions?

The problem persists even after having uninstalled the old LR5, deleted the LR5 catalogs, and restarted the computer. The LR6 catalog won’t show up in Libraries.