MS Outlook 2013 blocking cursor

I’ve been using Stardock Multiplicity 2 for years on my laptop running Windows 8 and my pc running Windows 7 without any issues.

Recently I reinstalled my pc with Windows 8.1, and I decided to purchase Multiplicity version 3.

I installed it on boths the laptop and the pc, connected fine and all but now there is a very annoying issue.

On the pc (Window 8.1 Enterprise), when Microsoft Outlook 2013 is active, that is in the foreground and not minimized but fullscreen or custom size, I can’t move the cursor to the laptop screen. If another window is active – say Internet Explorer – and Outlook is open in the background, it works fine. So if Outlook is active, the cursor won’t move to the other screen.