The OpenGround Launcher can be downloaded from https://softwaredownloads.bentley.com/ to find the latest version type "OpenGround" in the product search box in the top right corner.
All other OpenGround Products are downloaded from within the Launcher and so only the Launcher is available on the Software Downloads Page
Access to the Bentley Software Download page is only available to users with the correct permissions. If you are unable to access the download then please contact one of the Bentley Administrators within your organisation to either give you access or download the software for you.
The following article will help if you are unsure who your Local Bentley Administrator is.
https://communities.bentley.com/communities/other_communities/licensing_cloud_and_web_services/w/wiki/52644/how-do-i-find-my-administrator