I just had a look at it. The Starling version has not been updated for a few years and was written for Starling 1.6. It says it supports "Starling 1.6 and higher" but Starling changed significantly with version 2 so it might need some work to get it compatible with the latest version of Starling.
The latest version of Starling it’s probably compatible with is Starling 1.8. You could use that, but you miss out on the improvements in Starling 2, and might find it harder to get help with issues.