From the initial page, enter "12.0.2.mp04" (including the quotes) in the Search box to see a list of links for the release letter and the available release package.
Alternatively, the release package can be found in the file navigator by selecting 'NX' from the Product menu on the left of the page and then expanding the following folders: Product updates > Maintenance-packs > Nx12 > Windows (64-bit).
Sincerely,
Siemens Product Lifecycle Management Software Inc. Digital Factory Division SFB-NX-8007202 Product Information: