restore code to uninstall the legacy plugin

Author: sandboxcoder

obs-studio-client/source/nodeobs_service.cpp

@@ -477,7 +477,8 @@ Napi::Value service::OBS_service_uninstallVirtualCamPlugin(const Napi::CallbackI
 	WaitForSingleObject(ShExecInfo.hProcess, INFINITE);
 	CloseHandle(ShExecInfo.hProcess);
 #elif __APPLE__
-	// User must manually uninstall the Apple SystemExtension
+	// User must manually uninstall the Apple SystemExtension (new obs-virtualcam)
+    g_util_osx->uninstallPlugin(); // uninstall legacy plugin
 #endif
 	return info.Env().Undefined();
 }