Photoshop Elements :: Difference Between Hour Glass And Thumbnail

I am using Elements 11 and was just saving a photo that I had just completed some edits on when the power went out in our area for just a split second. When it came back on and I went into elements orginizer, my photo was there however, it showed an hour glass where the thumbnail picture should be. If I click on the hour glass, my picture appears in full size. I can even open it up in editor and the photo is there. It is just in the orginizer where the thumbnail should be that the hour glass appears. After trying everything I know to correct this issue, I uninstalled elements from my computer and then reinstalled it hoping that this would cure the problem. how I might get the thumbnails to reappear. Also, since reinstalling the software, I have upload new photos and they too have this same problem.