After 5 minutes of testing, I have found these annoying bugs:
1, FTPRush only works in "Single connection mode". If this is unticked (for non-english people = disabled), queue processing does NOT start whatsoever. Easily reproducible anytime. Simultaneous transfers are NOT working at all in this version.
2, Queue stops processing when there is timeout. I have to manually press "Play" (green triangle) to start downloading again. Log:
(19:14:32)  Encryption algorithm: TLSv1 DHE-DSS-AES256-SHA-256
(21:26:49)  Timeout, Connection closed
(21:26:49)  Server Disconnected