I have used it for years and find it faster and more efficient than the native Windows Search (indexed or not).
Just do a search for *.jpg
or whatever file extension you likely used when saving them.
.png
.gif
.tiff
.bmp
I'm not familiar with the product but as I recall it was part of
http://windows.microsoft.com/en-us/windows-live/essentials
Maybe you need to re-install it??