I have a different proprietary validity sensor, so I cannot guide you but:
It probaly removes fingerprint gui because it relies on fprintd which is being replaced by the proprietary one. You don’t need fingerprint gui.
I use these commands to enroll fingers without the gui:
[ Enroll, Verify ]
fprintd-enroll -f “right-index-finger” “$USER”
fprintd-verify -f “right-index-finger” “$USER”
fprintd-enroll -f “right-ring-finger” “$USER”
fprintd-verify -f “right-ring-finger” “$USER”
fprintd-list
fprintd-delete