Refer to these instructions to perform installation:

https://www.vegascreativesoftware.com/us/support/installing-and-activating-add-ons/

• After installation has been completed, start the "Ignite Advanced VFX" Pack via the Windows search field.

• Click on "Activate & Unlock".

• Sign in with your existing account or create a new one by clicking on "Create An Account".

• Fill in the plugin's serial number. You can find it in the purchase confirmation email you received.
  
• Click on "Activate now".

• To list all "Ignite" effects, simply select the "Video Effects" tab and type "ignite" in the search box.