Please bare with me as I'm new to Macs and OSX. I have a late 2012 iMac 27" and I love it! When I download a program it shows up in downloads. I open it up and it installs the program. I then have a disk icon on my desktop of the program. I just want to keep the downloaded program in my downloads and install it in launcher. I don't want the damn disk icon on my desktop. How do I do this?