A locale problem

Hi all. can somebody know whats is there problem - I’m opening rawtherapee one, but everytime have English lang only. About rawtherapee 5.1 app.
I’d set lang for it as Russian one, close app, and open again and ! watch Eng one anyway ))

windows 7/32 bit
rawtherapee 6.1

I can’t update my app to newest version )have win7 32 bit one).
Help please.

What is the locale of your windows 7 system?