Hi Stan.
I'm running the 5.12 version from the website download page. When I added the plugin source links, it is still not installing anything.
Example. For the "Automation" plugin(and similar for other plugins) the app log says; INFO [org.netbeans.core.startup.NbEvents]: Warning: the module C:\Program Files\Expert Lotto 5\modules\com-expertlotto-automation.jar could not be found, ignoring...