How to skip an update in Yosemite?

Hi I want to skip this update in Yosemite and cannot hide it by right click > hide update because the right click simply does not work.

Also tried in terminal:

softwareupdate --ignore Pre-release

Any thoughts?

Check this Apple page for screenshots.

1. Open the App Store Preference Pane: Go to the Apple Menu () and select System Preferences. Select the App Store icon from the list of Preferences icons.
2. Disable Pre-Release Updates: Click the "Change…" button next to "Your computer is set up to receive pre-release Software Update seeds."
3. Confirm Your Change. A dialog will appear to show or hide pre-release updates. Select "Do Not Show Pre-Release Updates," and your Mac will no longer receive pre-release updates.

If you look at https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man8/softwareupdate.8.html you will see that this can be fixed easily from terminal:

 softwareupdate --ignore RAWCameraUpdate6.05

I'm happy to FIX THIS FINALLY!