If “DUAL CUBE MIDI” is not shown in the “CONNECT” pulldown menu on the Bluetooth settings screen of the DUAL CUBE LX Editor, “DUAL CUBE MIDI” might be connected on the Bluetooth settings screen of your mobile device.
On the Bluetooth settings screen of your mobile device, delete (unpair) “DUAL CUBE MIDI”, and then pair from the Bluetooth settings screen of the DUAL CUBE LX Editor.
For details on how to connect, refer to “Connecting the DUAL CUBE LX Editor iOS App to the DUAL CUBE LX”, “Connecting the DUAL CUBE LX Editor Android App to the DUAL CUBE LX” or the related Q&A “I can’t connect to the DUAL CUBE LX Editor.”.