Which part of the plugin do you need help with?
VShutter-Flash can be used alone or in combination with the Viewfinder effects. It is animated by default. For a shutter sound, search in the Music and Sound Browser for “Shutter” or use the audio file from the Canon 7D shutter which you can download from this link.
Use the Title inspector to switch from a shutter to a flash effect.
Applied Shutter Effect
Here’s the VShutter-Flash title effect connected to a clip after the Viewfinder effect focuses in the video. Note how the VShutter-Flash effect is placed underneath the Viewfinder effect. Note also the Hold frame that starts after the shutter closes. To create a hold frame move the playhead to the frame you want and press Shift-H.