I do the same thing as randym77. Every project, several versions, then forget about it, only to go back later and can't remember which pz3 is the "good" one. But I have good news, a zipped PZ3 is lot smaller in file size, so even if you are a pack rat like me, at least you can free up some disk space by zipping the projects. I haven't had any problems unzipping and reusing formly zipped pz3s. bB