TDE opens "Removable Device" notifier twice

Hi list, I'm on TDE R14.0.4, Mint 18 installation. If I insert any USB memory stick I get two icons on the desktop and two pop-up windows notifying me "a new medium has been detected". E.g. one icon gives hint "/dev/sdd", the other one "/dev/sdd1". One of both mounts device, the other one states "unable to open device" even if I press it first. The correct message is: ========= snip =============== Unable to mount this device. Potential reasons include: Improper device and/or user privilege level Corrupt data on storage device Technical details: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.UDisks2.Filesystem' on object at path /org/freedesktop/UDisks2/block_devices/sdd ========= snip =============== Anyone any idea where to look for this problem? Even an USB printer opens a notifier window asking what to do with the removable device. I already moved away the .trinity folder and logged in again without success. Any help is appreciated Gerhard PS: I could try to chose 'do nothing' and check the 'always do this for this type of media' checkbox for the non working device but I fear, that afterwards even the correct working notification will not display any longer.