@Ary-Vinicius--Nervis-Frigeri Please. Some detail would be very-very nice.
You have an Omega2(?) FW v0.?.? ???, an Arduino Dock 2, a host PC with some OS ??? and with Arduino IDE v1.?.?, ...
You want to flash some bootloader into the on board ATmega chip. Which one?
BTW what does "recover" exactly mean for you in this context?