objects previously recognized on desktop app

I have found the issue. At one point, I changed the user logged in to the application under test (AUT). To do so, I needed to run TestComplete as administrator. When I performed the upgrade, the shortcut which I had set to run as administrator was overwritten. I had no knowledge that object recognition required this as I had changed it for a different reason. I also had no visual indication that the shortcut was changed. Admittedly I did not notice the absence of the dialog box I was accustomed to seeing when opening TestComplete for administrator priveledges. When I updated the shortcut to tun TC as administrator, the recognition appears to have resumed.