The first time you execute a DXL Editor feature, a dialog box invites you to specify the license location. For a node-locked license, the location is the path in your file system to the license file we provided. For a floating license, the location is a reference to the server name (e.g. "@myServer" or "27000@myServer").
This license location can then be changed using a preference page: Window > Preferences and DXL Editor > License.