Ive just downloaded the tool, I ran it and had no issues with connecting to it, both the dedicated server and the game are on the same PC, but I was able to see the server within the games server list just as I would any official server.
I rent a dedicated from another server host and the other day It was timing out for me, the errors that were within the log file of the game related to AMPQ messaging, I restarted the server and all was fine.
You may find more tailored help here as this is their forte.