My parents recently upgraded computers and are now running windows 7.  We have catalog pages that we did on  an older computer using printshop deluxe 11.   This program was to old to run on new windows 7 so we bought printshop deluxe 3.0.  The files are all .sig files that we have saved.  For some reason the new PS deluxe 3.0 will only open some of these files.  15 out of 65 to be exact.  Some of the files open up right away, when opening others the whole program shutsdown, and on others it says low memory for application ( or something along that line).  The catalog pages consist of jpeg pictures and some verbage.  I dont understand why some will work and others dont.  Any help would be appreciated, I have hours and hours worth of work saved for these catalogs for my families business and would really like to avoid having to redo 50 sum pages.