Topic: Can't uninstall dropzone (free trial) and can't install App Store one

I moved my drop zone free trial app to the trash and cleaned the archive. After that I am trying to install the drop zone from the App Store, but it is appearing the follow message: "If you want to replace it with this version, move the existing app to the trash."
Though there isn't any app installed, and the trash is already empty.
Can any one help?

Re: Can't uninstall dropzone (free trial) and can't install App Store one

Double check you deleted it from your applications folder and also your downloads folder and try a reboot. The app store gets confused sometimes.