Q-flash is a bios flashing program, Since your asking IF you need to upgrade the bios the answer is no.
There is a complete discription of it in the Spanish literature you received called Manuel. Suggest you read it thoroughly regarding bios flash before you try it. There are several different methods offered and if your system is running you can think about it for a few days or weeks. Gigabyte lists all of the bios updates available on their website for your particular board. Most logical question is are there any updates relative to your particular 965 chip.