Editing Text in Seat Map- Facility Manager

HELP!

Trying to edit our house map because we are re-lettering our house for 2015. Following the directions found here:http://www.tessituranetwork.com/Help_System_v12/Tessitura_v12.htm which mentions being able to erase the text by right clicking where the text begins and selecting Seat Editor but that does not appear to be showing up.

When I right click over the text i get just the box with the Define Seat numbers, define continuity etc...

Any ideas? I figured out how to re-letter the actual seats but I need the Text to match up.

THanks,