Adobe Design Std CS 6 for MAC and WIN, POLISH language how to change into ENGLISH language?

I bought on May Adobe Design Std CS 6 for MAC and WIN, language POLISH. Is there any way to change/upgrade into ENGLISH language? I don't want to buy another program license, because I'm the only one worker in my business, but I can pay for change...please help...

I used to work on English version in my latest job and now I see the big differences beteen languages..