PSP X4 changes resolution

I had been using PSP X2 - very good app and am very pleased with it - saw the offer from Corel for the latest release X4 - downloaded and installed - then SP1 install just after install of X4 - all was great untill I noticed that all of my high res camera pics were re-sized to 72 dpi resolution originaly 300 dpi - the pixel size was not changed - just the resolution - I re-installed X2 and found that if I save a file in X4 will save with wrong resolution - how do I set the default resolution and/or tell X4 not to mess with the resolution of the image if indeed this can be done?

will try to contact Corel - nothing in X4 'help' is very helpful in this regards