Hi,
Yes this version number rarely changes.
The key thing is to check the version number of the DisplayLink Core Software in the Control Panel.
Regarding the upgrade - removal of Windows it's difficult to know what has happened - how did you restore Windows 8?
Here's my suggestion:
1. Disconnect the dock
2. Uninstall the DisplayLink software
3. Run the cleaner tool from here:
http://www.displaylink.com/support/ticket.php?id=297
4. Install v7.3M0 from here:
http://www.displaylink.com/support/downloads.php
5. Reconnect your dock
If you still have issues you may need to update your laptop's graphics and USB 3.0 drivers - see the guide here:
http://www.displaylink.org/forum/showthread.php?t=896
Logs would be welcome if you're still stuck.
Thanks,
James