[Solved]-How to apply highchart's license-Highcharts

You just need to set:

credits: {
    enabled: false
}

forum post

I did it in the global settings for my app:

Highcharts.setOptions({
    ...
    credits: {
        enabled: false
    }
});

I then just created a license folder for highcharts somewhere in my app where I dropped the license PDF my company gave me upon purchase (just for completeness).