I just disable it from starting up on my Mac ..., heres how (click on attachment) ...,
Attachment 6891
After following this procedure and you restart your Mac , Application Manager will no longer load and open on startup . If you do need to open it you can however still do so from going to your Applications Folder and clicking on it from there (or elsewhere if you created a shortcut for it)
Also better apparently to check for updates directly from your Avid account than depend on the buggy App Manager.