So with much trial and error I've realized that in order to upgrade to SPPB 5 one must uninstall the old SPPB otherwise SPPB 5 dosen't function properly, and Google Font API cannot be added, etc.
However, when the old SPPB is uninstalled, any modules created with it are deleted.
Is there a way to keep the modules after upgrade as some of my sites have many modules and it would be labor intensive to have to export every module and re-import it afterwards?