I purchased LR 6 desktop as a download from Amazon tonight. It downloaded a file named Adobe_Photoshop_Lightroom_6_Mac_Download_Downloader.dmg, Clicking on this allowed me to download and install LR on my mac. I was hoping I would get the actual install (something that I can burn to disc, incase I have to re-install). Am I missing something? Where is the actual software? I see i have the application in my "Applications" folder. Amazon emailed me the activation key, but how do I install it on my second computer?