DS457 Reset to factory settings - hardware or RS232

I recently bought barcode scaner DS457-SR20009 which connect to PC over RS232 cable.

Trigger mode was settled to default (presentation) mode and I scanned configuration barcode that switch reader to "Software Trigger Only Mode".

Does anybody know how to gain access over trigger again or how to hardware reset back to factory settings. Scanning configuration codes is not an option because I cant trigger reader. Only solution is over RS232 cable connection.

Which software i can use to trigger reader or is there command to send to reader?