You could try putting the prefix .jpg into the search line.
When using the program on a hard drive, it will pick-up every little icon from every program on the PC (they are all images) - that is why you get so many!
I suggest that you stop the process now, if not already done so. You can then go to the folder where all these images have been saved, probably D.I.R. in C:Programs and save any that you wish to keep in a separate folder while deleting the rest.