Manage Engine OS Deployer Licenses

Manage Engine OS Deployer Licenses

Can someone advice please the following Scenario:

 

My organization has 100 computers and I purchased 100 licenses to be used for deploying OS to each machine. Another 100 new computers arrived to the organizations, do I have to buy another 100 licenses or I can use the purchased ones??

 

 

Does the Manage Engine OS deployer support Windows7??