Thanks for your kind answer.
Yet, how many times have I to do this operation? ( http://domain.com/ru/?verify_license=1
Sometimes My site is offline because of that.
My solution (before contacting you) was to put a new fresh license file & it did work for some time, then some days again I got: You don't have appropriate license...
Please Edvard which is the best way to eliminate that problem?
Thanks in advance,