After Update to Yosemite iMovie 10.0.7 Dated 10/9/15 Will Not Update

I just yesterday updated from Mavericks to Yosemite. After doing all my updates, only iMovie 10.0.7, dated March 9, 2015, will not update -- but what did update was the same version -- 10.0.7 dated March 28, 2015. I cannot find any way to get rid of the March 9, 2015 update and it's very annoying that the App Store icon in my dock keeps showing I have one update to do. There is enough with Yosemite I'm not fond of, and this is by fare the most frustrating. Does anyone know of a way I can get rid of this update so it won't show in my dock? Thanks.