Downloaded forfiles.exe!

Found some changes in following command ( I am using v 1.1 forfiles.exe),

for %I in (TRN sqb bak) do FORFILES /S /D -2 /M *.%I /C "cmd /c del @file"

 --  @file is case sensitive, it should be @FILE

 --  Better to use properties with “-“ tag than “/” because 

     forfiles.exe behaves differently with –M and /M

 -- If you want a include the command in a .bat file, then replace %

     with %%