After Yosemite upgrade (and with up-to-date PP CC 2014), when I change a clip and try to render that clip only via "sequence/render selection", the option appears in the dropdown but when I click on it, nothing happens. When i attempt to click again, it's not even an available choice in the drop down. DOES NOT WORK the first time and CEASES to be an option thereafter. Help? Is going back to the prior MAC OS an option?