You can download the latest individual item's RBZs from:
https://sketchucation.com/pluginstore
then use the native Installer...
You can also [re]install the SketchUcation Toolset:
https://sketchucation.com/resources/plugin-store-download
Then use its "ExtensionStore³" dialog to "Auto-install" selected items from the SketchUcation PluginStore.
If you had this tool already installed in the previous version, then you might have some 'Bundles' set up or at least 'Updates' showing as being available - access this via the 'cog' icon in the dialog's top bar...
These allow en mass Auto-installation of the latest versions of relevant RBZs...