This software is to custimize the printer.

Run SetupCSJPrnCS-E.exe to start the intallation.
After the installation is finished, 
  Start => All Programs => CITIZEN => CSJPrnCS
then the software will start.
This software covers other models than CT-S281.
You can see the usage of the software from
  Help => Usage

If the software is updated, it will be shown on
http://www.citizen-systems.co.jp/english/support/download/printer/utility/software/index.html

