Choose between the 3 types of Season/Episode schemas. This will be the format after renaming.
S1E01: The Big Bang Theory.S1E01.Pilot.avi
1x01: The Big Bang Theory.1x01.Pilot.avi
101: The Big Bang Theory.101.Pilot.avi
You can turn On/Off the Showname/Season or Episode Titles. See the green preview above.
Sep1 goes BEFORE Season and Sep2 goes AFTER Episode.
Only allows <spacebar> - . _ () 
For files which contain more than 1 episode (usually a 2 part show), you can set how it is renamed. See the green preview on the right. Only the first episode title is added.
The Big Bang Theory.S1E01-E02.Pilot.avi