Dave,
if you start the Agent for the first time it should ask you a couple of questions and generate a token file.
What could cause an issue is the Java Service Wrapper.
You could try the following steps:
- Stop the Agent
- If it does not stop kill all related processes
- Delete the data directory
- Use the nowrapper script /bundles/agent-4.3.0-nnnn/bin/hq-agent-nowrapper.sh to start the Agent
Cheers,
Mirko