Go ahead as i did and update the console to 5.5.3 as you already have haxchi... and then update all you´re games easely just launching those like a normal game. I was on 5.5.1 and after get haxchi i update to 5.5.3 as meny recommend me to do. Also, there´s no reason to not update as you are already on 5.5.2 and with haxchi.