According http://www.daypilot.org/files/LicenseAgreement.pdf "a single designated developer of the Customer may use the Work for development and testing purposes".

I am going to be the one developer in the cumpany who will develop/extend the control. However the source code will be included into Version Control system,and other developers will have access to the code.
I hope, that it is not required to bye licences for all developers in the team.

Please confirm.