I think I have the same problem.
The announce feature (showing the instances) sometimes works, other times it doesn't and lately it has been mostly not at all. I can still connect manually by filling out the server and instance name manually, and it connects fine, but it's certainly not ideal.
I'm running the latest VEPRO on Windows, one slave and a master machine.
Is there some sort of a trouble shoot list to go through to sort this out?
Thank you,
Erik