Hereafter, you should be able to open the Excel file without any problems. How to fix Excel file format and extension don’t match? To fix the “Excel file format and extension don’t match ...

A PBP file is a type of firmware file used to update a PlayStation ... and then resaving the file in another format that's compatible with Excel.

XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.

Check for Office updates manually and install the same (if available). Open Excel and go to File > Account > Update Options > Update Now. Microsoft Office will check for updates and install them ...