Hi James.
Don't worry, you won't have to rebuild the panel. It sounds like you haven't added your Carbonite Plus/XPression Studio to your DashBoard tree on the second computer. Once you do that, your panel should spring back to life.
If you're trying to use the same panel to control a different Switcher/Xpression combo, you can also do that by going into "Edit Mode" and selecting the "Data Sources" button in the toolbar to point the panel at your new devices.
Cheers.
James
#DashBoard