Read only AWT, Warning

It would be nice if Lectora could provide some type of warning when you open a Lectora file that is already open. Similar to the warning received when you open a Word or PowerPoint file that is already in use. I don't know if Lectora has the capability to do a "Read Only" file like those products, but having a warning would be extremely helpful because we do colaborate on WBTs. As you know, if 2 people are viewing the same awt file, the last one who saves, WINS!-Hans