From: me@somewhere.invalid   
      
   Terry Pinnell  wrote:   
      
   >I'm looking for a way to change all the extensions in a folder AND its   
   >subfolders. My batch skills have dropped over the decades from novice to   
   >almost non-existent so I'd much appreciate some help please.   
   >   
   >I do have the excellent tool Bulk Rename Utility but that applies   
   >filename changes at single folder level. My parent folder has scores of   
   >children (and quite a few grandchildren), so that would be tedious and   
   >time consuming.   
   >   
   >Specifically, I want all the *.ino files within say c:\docs\xyz to   
   >become *.txt.   
   >   
   >If it matters, I'm using Win 10 Pro.   
   >   
   >Terry, East Grinstead, UK   
      
   I'd still like to see a BAT solution for comparison, but meanwhile   
   further googling gave me this neat method at a command prompt, with the   
   parent directory selected:   
      
   for /R %x in (*.ino) do ren "%x" *.txt   
      
   Terry, East Grinstead, UK   
      
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