Hello mahimahi42 and welcome on this Forum
Do you want install a software from the page All Softwares or from your personnal software's collection?
From All Softwares: All is writted on the top
Click on this icon
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to install or update the software > Launch your LiberKey and Files associations (menu LiberKey Tools -> Enable files associations) and finaly just click on Install now on my LiberKey or Download setup package.
From your personnal collection: Add the software's folder in MyApps folder. Open Liberkey 4.4 menu and drag-n-drop the executable in "My softwares" category.
Right click > Properties > Edit path with
..\..\MyApps\Your_software\Your_softaware.exe