To install our software you need to be running a full version of Windows which allows the installation of Desktop programs or applications. If you have purchased the Pro version of the Microsoft Surface tablet, it will be running the full version of Windows 8.1 which does allow Business Plan Pro to be installed.
According to Microsoft, the Surface and Surface 2 both run Windows RT 8.1 whereas the Surface Pro and Surface Pro 2 run full versions of Windows 8.1 Pro. Unfortunately, according to Microsoft's article, Windows RT 8.1 will not allow the installation of Deskop Apps.
Here's a link to Microsoft's comparison of the Surface 2 and Surface Pro 2 :
And a link to Microsoft's documentation on the features of different Editions of Windows 8.1. You will need to expand the Apps area of this article to see which Editions allow you to install Desktop Apps: