The client version does not match the server version. Client version is blank. NAV2013 R2 RTM

Hi all

Using NAV2013 R2 RTM.

I get the following error when I try to run an object from the dev. client:

---

The client version does not match the server version. You can only connect to a server with a matching version.

Client version:

Server version: 7.1.35473.0

---

What happens is that the Dev.-Client tries to start the RTC from NAV2017.
To avoid confusion: Yes, this is a Dev.-Server with NAV2013, NAV2013 R2, NAV2015, NAV2016 and 2017 clients installed

However.. in my case only NAV2013 R2 sucks. All other versions work.

I'm assuming that the client version is blank because it started the wrong RTC version (NAV2017).

So how can I force that NAV2013 R2 always starts the NAV2013 R2 RTC?

Best regards