Try to find matching extensions for orphaned (nameless) files
This option is available from the Recovered UDF File System icon : . So only available after a "Find missing Files and Folders" action and when UDF recovery was enabled.
In fact this is done already automatically after the scan action if checked in the properties (default).
The option provides you the means to search for extensions again or in case the option wasn't checked yet.
Every file with no extension yet is opened partly (if not located in an erroneous sector) and IsoBuster dynamically determines the extension (e.g. *.jpg, *.gif, *.bmp, *.wav, *.pdf, ...). Some extensions are more of an educated guess, e.g. *.mp3. Some files are built up so that they can be several file types, IsoBuster then adds several extensions which you will have to test, e.g. .xls.doc