While trying various presets from the "Quest Link" tab settings I can't go back to the default setting. As it errors with the message "Registry key has subkeys and recursive removes are not supported by this method" How to return to default settings for the AirLink as it now is not operable after messing around with presets, which gave mentioned error? Also, I have googled this error and it's a generic error for .Net. https://stackoverflow.com/questions/15606194/attempting-to-delete-registry-keys-with-subkeys-results-in-an-error <-- possible solution for the next version.