[Zope] How to upgrade Zope-2.7.1 to Zope-2.7.4 (Windows)

Hi, I want to upgrade my Zope-2.7.1 to the lastest version Zope-2.7.4 in Windows. As far as I know it might be done by simply installing Zope-2.7.4 (using the executale binary Zope-2.7.4-0-win32.exe) over the existing Zope-2.7.1 (meaning the destination directory will be the existing Zope home). I have created many Zope instances (using Zope-2.7.1) running as Windows services. So if I upgrade the existing Zope-2.7.1 (rather than install Zope-2.7.4 in a new directory) then I don't have to make any change into my existing Zope instances. Could anyone tell that this is the right thing to do it or I would miss anything? Thanks, Trung Tran Email: trung.tran@hwe.com.au