Once installed and configured, you do not need to launch the application anymore to benefit from the software's features. All Intego software products are handled by a background, faceless application (commonly referred to as a 'daemon').
You should NOT add any Intego products to your Startup Items/Login Items Preferences
Intego software programs automatically launch and run in the background once they are installed. There is no need for them to be in Startup items with Mac OS X. The only reason you would need to manually launch software is to run a manual scan, or change settings. Your software programs are running/scanning all the time in the background and will alert you if a virus is detected, or a problem is found.
To make sure the Intego daemon is running, you can use Activity Monitor which is in the Applications -> Utilities folder. Launch Process Viewer, display all the running operations and check for "integod" which is the name of the daemon.