Hi, you should try to watch this video, it is well explained perhaps it could help you for the installation
And you will not ruin your headset, and don't have to do anything if you don't want, cause you have thousands of official profiles made for you for more than 850 optimized games at the moment, so if you don't want to tweak your games, just don't tweak them and use the official configurations.
You can choose to save your battery or to push improve your games and in general, it drains your battery a little bit faster.
Anyway, I'm not able myself to do refund, you must contact Itch.io support ;-)