Please try flashing the firmware when connected when it’s in bootloader mode, get the firmware file from [Download] Midihub Editor 1.11.10 & Firmware 1.11.11 and do Device → Flash Firmware.
When starting the flashing procedure while the device is in bootloader mode, it won’t save the memory contents, but I you should be able to find the last backup on one of your machines that you used to perform the firmware upgrade before here:
C:\Users\Giedrius\AppData\Local\Blokas\Midihub Editor
(Change Giedrius to your user name, or just do Start → Run, and enter %LOCALAPPDATA%\Blokas\Midihub Editor and hit OK)
After the firmware flash procedure, if it connects well, you should be able to import the backup file using Device → Import Everything…