Qualité de rendu bloquée sur mon visor, une solution ?

Some time ago I used Pimax Experience to increase the rendering quality of my Pimax 5K+. I tried the maximum settings and then left it on the default value. Since then the resolution values read by SteamVR are funny, as if my headset was configured to the maximum rendering quality. Then by chance I read the warning in Pitool about using those settings with caution because they can get stuck on the headset. I think that is what has happened here. It’s not a terrible problem because it’s just a matter of reducing the resolution in SteamVR settings. However, now I would like to sell my headset and I wonder if there’s any way to revert it to default so that its new user doesn’t get confused with the resolution settings. Any help?