I need file processor for ex. "The Office [1.01] Pilot"

I actually thought this would be already in tvrename because of the fact that most complete season torrents organize their files this way.

I've found the easiest way is to use Publicware's FileRenamer (http://www.publicware.dk/EN/FileRenamer/Index2.htm). It's completely free, fairly small, and you can use it's Replace function to change "[1.01]" into "S01E01" in each instance of the selected files. That is just one small very useful feature this program has.