I would start with something like this: "Today's session will be a bit different and very exciting to me.

I have this game, Game Name exact version, which I love and I logged hundreds of hours in it, however there's this little detail that bothers me like a pebble in a shoe: (details of the problem here). I think that it's all encoded in the file (file name), but it's binary and I have no idea how to access it :(

Could you perhaps guide me how to analyse and "decode" this file so I could later change this behaviour? I don't have any experience with reverse engineering but I'm excited to try.

All game files are in /full/path/to/the/game

Thanks!"

Works for me.

Be excited, frame it as a learning opportunity, make sure it's obvious its for your own enjoyment (not for distribution).