Does the x32 version need to be uninstalled. Using Windows 7 Ulimate.
You can have only ONE version installed. But you can install as many as you want as Administative. See this wiki entry how to do it for the different OSs. (Installing several versions of LibreOffice in parallel - The Document Foundation Wiki)
I’ve got both 5.0.0 + 4.4.4 installed (Debian 7.9).