I can simply open additional windows and compare photos side by side.sometimes up to six or eight open windows using the Edit feature. One of the features of Version 3.1 that has not been available in later editions is Edit on toolbar, that allows for multiple photo editing simultaneously. At the moment I'm using a trial version of Photo Editor 6 and find it has too many bells and whistles and far too complicated for my needs. Recognizing that companies make revisions and new versions to stay in business, can anyone offer a solution. From what I understand my ancient version will not work on either Windows 7 or 8. Microsoft will no longer support XP after April, 2014 and it's unclear if that would impact the XP mode of Windows 7, too. From what I read, my older programs would still function using that option. The problem I confront is how my old version would migrate across to Windows 7 Professional, which has an XP mode option. I would be in a minority on this Forum, since I'm a total novice and use the program for very basic use only. Over the years I've tried out later editions of ACDSee and none are as user friendly, basic, simple and easy to use and understand as the 3.1 Version, purchased almost 13 years ago.