How to preview your mobile skin on your PC or Mac.
In VT Pro click on Preview and when you see the tour come up, press Ctrl + N to open the tour in your default browser. You can also set the Preview by default on opening in Browser within the Options > Preferences menu.
Then inside your browser go to Developer Tools. In Chrome that is F12 as a shortcut.
Then select your preferred device to display on the left side and refresh the page for mobile version (shortcut: F5).