Thanks for the tip.
Could you explain what do you mean exactly by : "using the RGUI I assigned the enable Turbo function to the same button I want to apply the Turbo function"?
I cannot find how to do this in RetroArch.

So far I created the cfg file for the game :
input_player1_turbo_btn = 1
input_player2_turbo_btn = 1

And I put this code retroarch.cfg :
input_turbo_period = 6
input_turbo_duty_cycle = 3

@capeman I suppose you are right. I have just got into a habit of updating "ALL" because to me that is somehow better, or what I should do... I understand that I need to do something different, not the software. I know how to hold packages that have binaries, I was just wondering if it was the same for those that don't. I guess I was just thinking about it a bit back to front. Thanks.