Hi. When I put photos into the programme, sometimes there is a pop up saying that the pictures are of a low resolution. The photo's were taken on a fine setting on a nikon D80 at 10gig pixels ?????
Make sure you're importing the correct file. If you're using a specific software to copy the images across to your PC and manage them, maybe it generated smaller thumbnail/preview images that you're accidentally importing instead of the original images. If that doesn't seem to be the problem, maybe you can upload one of those files and post them here. Would be interested to see this problem live. :-)