Hello,
I try 1.6.0p19 RAW, so it’s the raison why I don’t find “Send metrics to Graphite / InfluxDB” on “Global settings”
My lab is personnel (not pro) but I test is myself on my test server for probably professional used.
On this link:
I see raw and free version.
Therefore, the questions are:
Is it possible to have “entreprise edition” free for personnel test lab?
Is it possible to do the migration free?
Thank you for your time.
Edit : A part of the answer is here 
Editions | Checkmk