Reinstalling will not fix anything. The library tables are part of your personal settings and they are not touched by the installer. You either need to manually add the footprint libs to the library table OR you need to reset the library table (which is done by deleting it)
See Library management in KiCad version 5
How you got to that state is beyond me to be honest. My only guess would have been that you had an old installation of kicad on this machine with a left over library table or you deliberately deselected installation of footprint libs during the installation process. (By default all libraries are installed. When you then run pcbnew and eeschema the first time then the library tables are setup.)