Please click on the tab of the desired application in the overview. You will find here the latest version of the software as well as older releases.
After clicking on the desired application version, you will be redirected to the download area. Here information about compatibility, version name, release notes, file size and release date is provided.
By pressing the "Download" button you will receive either an .exe file or ZIP folder (unzip it afterwards) containing the software. In the next step, please install the respective application on your PC or HoloLens 2. Alternatively, you can click directly on the "Download" button in the application tab.