One more note: we were upgrading to the latest release Version: 85342940 on our test VPS server and our VPS has been cut of all the connections on all ports during the client update (installing languages)
Our VPS provider said, that the reason could be their firewall did its job and we had to clear ip tables in order to be able to connect to our VPS.
A few days ago our ESET antivirus used to tell that Standard ERP.exe tries to connect to botnet. Today I haven't seen these messages.