Download, import, restart, licence. The one step people get wrong is step 3 — so it gets its own warning.
The interface drawings here are simplified diagrams, not screenshots — enough to recognise the menu you are looking for. NinjaTrader® is a registered trademark of NinjaTrader Group, LLC. Precision Indicators is an independent developer and is not affiliated with, endorsed by, or sponsored by NinjaTrader Group, LLC.