Hello meggiedude,
I can't believe that the reason for a segmentation-fault can be that you have to much pictures. Don't get me wrong, it is (theoretically) possible (I don't know this program) that it doesn't work properly due to too much pics. But a segmentation-fault is a failure within the program itself and something completely different.
In order to find out where the pictures are stored you may use the commandline. Open a terminal and within your homefolder execute the following command
Code:
find . -name *.jpg -type f -print | grep -i nameofoneofmypics.jpg
Note that this will only work if the pics are really in jpg format, if not, change the command. For the grep-command use the filename for one of your pictures. In the output of the command you will see the path to the pictures.
Hope that helps.
Markus