Wix Toolset Upgrade
I am mostly putting this hear from myself and possibly anyone else who tries to do this. Wix Toolset allows you to make windows installers. What I have been trying to do all day was to enable upgrade of my application.
If a user installs my application and then later i release a new version they should be able to install this new version without having to go to the control panel and remove the old version manually themselves. This turned out to be harder then I thought to figure out.
The trick here was setting the product id equal to *. Then checking the versions to see if its an upgrade or not. If they try and downgrade well I am going to force them to go and remove the old version. Ideally they should not be downgrading after all my applications are awesome right!
Wix can be a pain but when you get it to work its wonderful.