Hi,
If you ever get this issue again a quick fix can be found at:
A Utility to Unassociate File Types in Windows 7 and Vista - The Winhelponline Blog
We've had this a few times. The remove User's choice comes in handy!
Dan
If your going down the Pi route which could be within your budget i'd strongly recommend looking through this thread:
Raspberry Pi • View topic - Xibo player (work) on raspberrypi
It has links to Xibo images that can be put straight on to the Pi's SD Card.