Recently there has been posts referring to AM. I have it in my app folder. When I open it I get alert that I cannot use with since it is ver 1.5. Where can I download latest version? 21.5-inch iMac,3.1GHz Quad-core intel Core 17, Turbo Boost up to 3.9GHz,16GB 1600MHz DDR3 SDRAM-2x8GB,1TB Fusion Drive,NVIDIA GeForce GT 650M 512MB GDDR5