Convert _XLS to XLS

In most cases simple reenaming of ._xls files to .xls should restore the full association and functionality of the file for Microsoft Excel spreadsheet files, no _xls to xls conversion is actually required. If your._xls file is corrupted, it is likely that only renaming the suffix won't work. In that case you will have to search for some some Excel recovery software.

If you have trouble recovering Excel files, perhaps contact Microsoft support or some Excel community forums.