It is only the .localized extension that is hidden by default, not the Virtual Machines folder itself.
In a Terminal you can use the following command to find any Virtual Machine Packages.
mdfind -name .vmwarevm
You could search for .vmx also as that is the Virtual Machine's configuration file. (Just substitute extensions in the above command.)
It is still not clear to me whether or not you were actually running a separate normal file based Virtual Machine vs. running the Boot Camp partition as a Virtual Machine. I guess if you go into Finder and select the BOOTCAMP volume and you cannot find the User Data you're looking for then maybe you were running a separate normal file based Virtual Machine too.
Uninstalling/reinstalling/installing a different version of VMware Fusion does not remove any Virtual Machine's you've created, no more so then uninstalling something like Microsoft Office doesn't delete any of the documents, spreadsheets or presentations you've created! Image may be NSFW.
Clik here to view.
So if you still want to use the Virtual Machine then I'd suggest you sign up for the free 30-day trial, download VMware Fusion and make sure you can access your Virtual Machine(s) and that it meets your needs/wants before purchasing it. Also the next major version of VMware Fusion is in beta and the GA release should happen sometime before October 15, 2013 so you may want to wait and purchase it then. You can also try the VMware Fusion Technology Preview 2013 instead of downloading the latest version of VMware Fusion 5.x.
