Right-click the location where the software opens the file from itunes. Or you can look up the installation directory. Ipa format is software. Or you can find it in my file, maybe it's right there. And quicktinmes can't be deleted, it has been forced to bind. There is nothing to delete in the installation folder. You can delete some software to slim down, or crack the machine and let the computer install it, but you don't have to leave the installation files in the computer.