No, the Developer License is not personal and applies to the number of seats, not the individual. You need a license for every developer who will be working with the software, i.e. the Highcharts 5 Developer License allows for up to 5 developers to work on Highcharts. If a sixth developer will be working with our software, you need to purchase an additional seat. However, if one of the current 5 leaves the company, and is replaced, you will be covered by the 5 developer seats.