Hello Hans,
Thank you for your message.
I do have similar problems since V6 although using actual Versions 6.07 for hosts and viewer and 603 for private server.
The server has its own version numbering. A new server release does not necessarily happen with each RU release. Currently, the latest server version is 2.6.0.3. If that's what you mean, then yes, it's the latest version.
For example the host is online and also online is shown in viewer but if connecting it switches to offline although being physical online. Or it is showing offline but if connecting it jumps to online.
During logging in a connection may briefly show as offline , but that doesn't actually mean that it's offline.
I do have many interruptions while working on hosts, if connecting again it takes 2 or more trials to get connection again.
In viewers Log I have many errors like
CheckID Connection. After process message. Host "xy:55655". MsgCode: 10
or socket errors like "EIdConnClosedGracefully".
If this happens with all your hosts, then probably it's not a problem with the Hosts. It could be a network issue either on the server side or the Viewer side.
To start with, could you send us logs from a few of your Hosts, especially from those you had connection issues with. We'll see if Hosts had any difficulty connecting to your server.
You can use the email support@remote-utilities.com to send the logs.