There are several steps to try if your Add-O-Matic won't start or stops running:
If your AOM was previously running perfectly and then "suddenly stopped working" means that something on your system has changed and is now blocking the Add-O-Matic from starting; it could be an update to your Anti-Virus, another application running in the background, or a system update of some sort.
The first thing to do is make sure there’s an exception that allows it to open in your anti-virus application. Check the help files for your AV application to see how to tell your particular A/V app to ignore/allow/exception/(whatever your app calls it), and enter the exact file name for the AOM (“Add-O-Matic11.exe”, for example, depending on which version of the Add-O you have). Then attempt to launch AOM – if it doesn’t immediately start, move on to the next step:
Make sure Elements and all components (sync agent & Organizer, especially) are turned off. Use the Task manager (right-click an empty space on the taskbar at the bottom of the Windows desktop and choose it from the popout menu). When it opens, choose the Processes tab and click each of the applications / utilities that you recognize and choose “End Process”.
Then attempt to launch the AOM. if it opens immediately, you’ll know that one of the things you closed is blocking it.
If it DOESN’T open, one-by-one, end other processes in the Task Manager, attempting to launch AOM after ending each one. You’ll eventually find the culprit. Look particularly for utilities with “sync” in the name.