The hotfix for County Callouts is now available for download. This makes the plugin compatible with the latest GTA/RagePluginHook/LSPDFR versions. You can download CC version 0.5.1 below, or alternatively on GPM/LSPDFR/5Mods.
A future version with some new features is also in the works. 0.6 will have more info announced as it gets closer to a release date. Highway Callouts will also be getting some new announcements soon.