One software license is required per computer.
Run-time NOT royalty free.
Desktop Developer License
This license is required for each Desktop version of Windows that will be used for development with the Toolkit, and is available in packs of 1, 4 and 8. Note that this license will not function on Server versions of Windows.
Desktop Run-Time License
This license is for each Desktop version of Windows that will make run-time use of the Toolkit, and is available in packs of 1, 4 and 8. Note that this license will not function on Server versions of Windows.