One software license is required per user.

The Unlimited-server edition enables you to execute your scripts against any number of SQL Servers at one time.

Support and upgrades
For the duration of the purchased support period; 1 Year, 2 Years or 3 Years, you will receive:

• Free upgrades: when a new major version of the software is released, you'll get it for free.
• Full support: if you hit any problems, you can speak to a dedicated product support engineer by email, forum, or phone.