Thank you for contacting us!
This offer is for already existing Pro users - those who had purchased the license before the release of 2.7.0. To run Sync on a Windows Server you need Business license with server support, which is enabled starting with 20 seats. Business license is quite costly though https://www.resilio.com/buy/sync-business/?seats=20&term=yr
You can stick with older Sync 2.6.4, but please note that it won't be receiving new fixes and features, download here https://forum.resilio.com/topic/71647-latest-desktop-build-264
Please let us know if any other assistance is required.
Best regards,
Resilio Support Team
Only for existing Users. So not for me or others who buy the pro license after the 2.7 release. So i will migrate to another Sync software, becaus now Resilio is useless for the future for me.