Why did iMovie disappear from my dock after I updated to Yosemite?

[iMore Question]

I updated my MacBook Air to the new Yosemite Operating System. When my computer booted back up, I noticed that iMovie was no longer on my dock. I searched my Application file & my entire computer. Nothing. So I just went to the App Store to re-download the video editing software only to find that I now have to pay $14.99 for it! What's the deal? I've had iMovie since I bought the computer & I use it very often.

 

[Just_Me_D]

I don't know. You might want to contact Apple Support to get this situation resolved.