Multiple MIDI Devices are not recognized

I have two STARRYPAD from Donner to control my Lighting with the first one and the Sampler with the second one.

While I have no probem in utilizing both devices in other Software and the config software from Donner, it is not recognized in rekordbox.

In every other Software I have the oportunity to select STARRYPAD and STARRYPAD-2 for MIDI In and Out but in rekordbox there is only one STARRYPAD. The second device is ignored.

Screenshots: MIDI-Devices in Config-Software

MIDI-Devices in rekordbox

What is to be done that STARRYPAD-2 is showing up here also?