Hi Nate, thanks for your reaction. I just tried running the trial on a different windows machine and you're right; there it runs without the server-issue.
On the first machine I now uninstalled and re-installed the latest trial again and the problem is still there. Again looking through all my firewall rules; nothing about spine or esoteric that blocks. So again disabled/pausing the firewall; still no luck.
So I looked inside the log and there is this error:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Telling me there is some problem with a certificate.
I'll include the log as an attachment.
So far without luck. I don't understand what else could be different between these two computers. They're on the same network and almost have all the exact same configurations and software installed. The only thing I can think of rightnow is maybe there is a different in Java JDE installed on one machine. But I'd say that's has nothing to do with the Spine installation, so I don't think that could cause this. Next to this: the older (bought) Spine version is running fine on both machines still. So there is some difference between the (older) official version and the trial-version...
I'm a little out of ideas now so help would be appreciated! Maybe you could read something out of the log I send you? Thanks!!