Fusion 5 downgrade question

I am trying to downgrade my Fusion 5 trial to Fusion 4 which I have a license for.  I have read the instructions on how to uninstall manually but it makes no mention of the programs installed within Windows.  So my question is this: Upon reinstall, will I still have my programs if I uninstall Fusion 5 and install Fusion 4?  The importance is that I do not want to burn throught my product licences upon reinstalling Fusion 4

Thanks