lightroom update issue

so today i got a pop up that said lightroom needed to be updated or choose a different location. so i chose to update. when i went into my liightroom, ALL of my photos looked like they had the same color scheme (preset). so i wondered if i imported some photos wpuld it look the same way... sure enough my imported photos also instantly had the preset on it. so i wondered what would happen if i exported the photo, and when i exported, it looked like a normal photo! HELP!!! i am in the middle of my holiday rush and have nooooo idea howw to fix this!