Microstation Version Pre-requisites.

When I have previously installed new versions or upgrades of Microstation, at least when installing on a new computer, I have had to get and install a Pre-requisite pack with  the Microstation program. When I have looked for a download of Version I have not seen a pre-requisite pack offered.

Is it not necessary now or can I use an earlier version of the pre-requites which I have on DVD, or how do I get the files?