I figured this out. I had to enable all the items listed under "UOC Update on Connect", and now the controller connects.
First of all, thanks for all the efforts put into creating this product! I built a simple version of it - PCB DRV8825_M_MT_F_BT, Arduino Nano + DRV8825 + thermal sensor, no other hardware is used (no Bluetooth, buttons etc.). I used the package MyFP2_DRV8825_338. The version for myFP2W is 2.5.1.3 . My issue is that I cannot connect to the board from myFP2W. Judging from the Log, it passes multiple tests, but then fails the backlashinenable test: ReceiveResponse Controller response: 4255 Read_backlashinenable...
This is excellent software, but what is lacking is support for 4k monitors. Specifically, the bitmap snapshots corresponding to recent recordings are way too small to be usable. (I am under WIndows 10, using version 7.1.2.0 of iSpy). I hope this will be addressed in a future version of this software.