I installed a fresh copy of Yosemite yesterday via a boot install drive I created on an external hard drive. Everything seems to be working well except for some application icons. The issue is with the icons of applications that I installed after the OS install. To this point, I have installed four applications: iPhoto, 1Password 5, Dropbox, and VLC. All four of these applications have the generic Yosemite application icon (white square with the letter "A" created by a pencil, paintbrush, and ruler in the bottom-right corner). The generic Yosemite application icon shows up in the dock as well as in Finder. So far, I have tried restarting the computer several times, restarting in safe boot, and doing a PRAM reset. I have been using OS X since 2007, but I do not consider myself to be an OS X wizard. I've included a screenshot of my dock below, and as you can see there are two generic Yosemite application icons towards the bottom. Thank you very much for your help.