Ok, I am going to sound like a complete idiot here but here goes. I have been using aperture for many years, I am a serious amateur photographer. 

I went to open my aperture this evening and it said something about upgrading to 3.5 so I clicked  on it. Then it said something about have to restore my library, so I clicked on that.  (I was a little preoccupied) When Aperture finally opened, there were no images on it. I do have some back up Vaults which I am hoping will restore my library, because there are approximately 10,000 images in it. 

Has this happened to anyone else.

Am I as stupid as I feel right now? Please don’t answer that.

Thanks for any insight.