title: Convert XLSM to XLSX
body: <p>I'm using the EPPLUS library to read data from Excel to create another file.  Unfortunately it does not support the .XLSM extension file.  Is there a nice way to convert .XLSM files to .XLSX file for the purpose of reading the file with EPPLUS?  </p>
  
  <p>(using EPPLUS for reading would be nice because all my code is already written using it :) )</p>