Jakke PNG

How in the fuck do I revert back to the original settings? MY colorsettings are wrong, and I have no idea which are the normal ones.. I've managed to set them so it's perceptually correct, but when I open files or whatnot the program asks me to set a colorprofile etc.. fucking annoying.

.....so either, how to reset to original settings.. or what is the normal color profile?

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..and I'm off.