Hi Roman,
On the current nrComm lib frontpage (http://deepsoftware.ru/nrcomm/) various demo packages links are invalid (some of them miss the ".zip" suffix )
Additionally the version history stucked at 9.23 but the download to the last version actually include 9.24 http://deepsoftware.ru/nrcomm/nrcommhistory.txt.
Best regards, keep the good work