I don’t know how this setting gets changed but it does. I
know it does because people keep asking me where their Open dialog box is. My
guess is a script turns it off and the user either escapes out of the script,
or the script crashes, before it’s turned back on.
If you see this when you press Open…
Type in the system variable
FILEDIA and change its value to 1. Press Open again and you should be back to a dialog box again.