In 4.x version we did have VDatabase.ResponseTimeout for all ADKs, which in fact was not working. Now we have resolve this issue in the VClient.dll and move this property into VConnection class.
Problem was, that if VClient was in the state Read or Write some command into socket, then on sudden loose of network connection VClient app did hang forever. We have redesign work with sockets for VClient.dll in the same way as it was in Valentina Server.