Flash MX 2004.
fl.mruRecentFileListType
Read-only property; an array of the file types in the MRU list that the Flash authoring tool manages. This array corresponds to the array in the fl.mruRecentFileList property.
The following example displays the number of recently opened files and the type of each file, in the Output panel:
fl.trace("Number of recently opened files: " + fl.mruRecentFileListType.length);
for (i = 0; i < fl.mruRecentFileListType.length; i++) fl.trace("type: " +
fl.mruRecentFileListType[i]);