I am having a bit of trouble with mine as well. Just built an A.87 with Zilents for my Duck Orion V2 (it's a perfect fit with Orion plate btw). When I first plugged it in, everything worked - all the LEDs lit up and I tested each key. As I was working on the keymap and LED setup, somehow the entire row from Tab through '[' stopped working altogether (oddly, ']' and '\' still worked, which made me think it was related to the firmware as those keys are numbered 82-83 while the rest of the row is 24-35).
Unable to get those keys working again, I tried to reflash the firmware (filename '18-08-02frimware.Ldn'). But the keyboard stopped responding entirely after that - the firmware appeared to load as the green bar went all the way and the status updates indicated it was uploaded. But the program said "No Connection" and I was unable to do anything, even go into bootloader mode to try to re-upload the firmware. I reset using B+L, which worked, but when I tried to upload the firmware again, I got the same result.
Any ideas? Is this firmware version defective by any chance?
Thanks! It's a gorgeous piece of kit when it works, hopefully I can get it back up and running