Just some hindsight on what happened - all properly written OS X software saves its settings (or most of them) in "associated files" in your ~/Library/Preferences (and some also ~/Library/Application Support) folders. If you use programs like ZapIt, whose main feature is that it removes exactly these files, you should expect to also loose your preferences for the removed software. Which might be a good thing in some cases, but like Kirk wrote, not exactly when you expect to use the software again in the future. PM is a very well writen OS X application (at least IMO), and it doesn't store any crud there except your preferences. So if you ever need to uninstall PM but expect to use it some time after again, no need really to use ZapIt or similar uninstallers. Just simply drag the PhotoMechanic.app to trash, after you clear your caches inside PM. ZapIt and similar are really only useful for software that leaves huge amounts of unwanted data in these folders and if you want to remove most traces of the installed software - but even so if the program leaves some data elsewhere, there is high chance ZapIt won't be able to find it. PM seems to be written quite to OS X specs in this regard, so there is no need for that.