The svManager license covers one web site. So if your client is simply moving her site from one server to another then she's covered by her existing licence. If she'll be running two web sites in future then she should buy a second svManager license.
Assuming that all your gallery folders are inside the svmanager folder (which is the default) then to clone the whole svManager installation, download everything inside the svmanager folder from the old site and upload it to the new site. Set permissions on the new site if necessary.
If you have any gallery folders outside the svmanager folder (because you moved them or imported them), then you'll need to move these folders across to the new site as well.
SimpleViewer Support Team.