Bootsy,
thank you for your reply.
Something is definitively going on with the MIDI tempo feature in general in CueluxPro.
Yesterday, I tried to feed a nice stable clean clock directly into my CueCore2 MIDI INPUT and it freezes CueluxPro as soon as I click and hold on the small tempo/BPM window.
The only way out is FORCE QUIT the app.
All the above on a fresh OS X Sierra and CueluxPro installation.
I really need this feature to happen. I was happy with Cuelux, but decided to move up to CueluxPro / CueCore2 mainly due to the dual MIDI control surface support and other expanded time of day based features.
Now, I am in trouble because I believe I can't even run Cuelux without the USB dongle (sold).
Alex