how can i remove licences from machines i no longer use ???2 licences are on old machines ..is it possible ??

Before selling or giving away an old machine, you only have to ensure that no one else will be able to run your license, by uninstalling or unregistering the software.

If you are referring to the computer count shown when running the Sonic Charge Authenticator, then no. This will count all computers you have authorized on, not just active ones. Under normal use you will not hit a limit. Our system will monitor excessive installations that could be a shared or stolen license that is in violation of the license terms.