settings in lightroom

[michellew25190640]

I just updated my operating system and it changed all my presets

When I opened lightroom it asked if I would gain it access to my photos, I accidently clicked no

How do I reset this so I can gain access to my photos, as of now I cannot open any photos from my computer

[JohanElzenga]

Please start by telling us which operating system you are using and to which version you updated...