It would be helpful if the ServiceDesk installer was named with the version number, or if the executable metadata contained a reference to the build number.  I typically keep the older versions of the installer in case I need to recreate an environment based on an older backup, and since all of these versions are named the same it can get confusing.  I typically name mine like: ManageEngine_ServiceDesk_Plus_v7509.exe

This is already done with the PPM files, but not with the executables.