I have installed MS Office 2007 via wine, which all works remarkably well.
However, MS Office has now laid claim to any 'office' files on my computer.
Is there a way to change the default application for a file type?
Can't you just right click the file, properties > Open with, and move the mark to the program you wish to be default?
These are the steps I followed:
Right-click on a file icon → Properties → Open With → Set as Default → Close.
Ubuntu-Tweak has a file type manager however to install it you will have to google for it and if you want to use it in natty you will need a ppa.