First, stop DCS World completely so it is shut down before doing anything!
You are mixing up the files that DCS saves automatically with the files you use "Save Profile As" files you save for yourself. DCS saves all settings automatically, there is no need to use "Save Profile As". I have previously suggested that you remove the X52 files from the "Joystick" folder and make a new one for the X52 by letting DCS save it automatically. Then you will learn that DCS only saves changes you do the profile and that the profile file has the same name as the profile row in GUI settings. You seem to not understand this fact.
All the saver profile files are text files that only contain "differences" you are doing to each aircraft profile, that is why the files are named "diff". They are regular text files you can open and look at but please please do not try to edit and save them as this will definitely bring you water over your head. Use the DCS World GUI settings and profile editor.
All profiles in DCS have "Game" and "Sim" but if you are not playing in "Game" mode you don't need to bother about the "Game" profiles. DCS "Game" is a completely separate "Game" in DCS where you are playing in 3rd person view, don't use it.
UH1H Gunner is, of course, the keyboard/joystick profile that DCS is saving automatically for you when you do changes to the Gunner side in the Huey. It has multiple seats!