i notice that meshcentral-events.db starts from scratch everytime service runs. But i can not find a way to browse this events database.

I think the same. But now i try to open DB file with events. Im looking for DB password to open database.

I have windows installation. If restart is needed, i restart service inside services panel.
This is from event viewer:
Starting C:\Program Files\nodejs\node.exe --harmony "C:\Program Files\Open Source\MeshCentral\node_modules\node-windows\lib\wrapper.js" --file "C:\Program Files\Open Source\MeshCentral\winservice\winservice.js" --log "MeshCentral wrapper" --grow 0.5 --wait 2 --maxrestarts 3 --abortonerror n --stopparentfirst undefined

no such file in any directory. File "meshcentral-events" is growing with service restart to 350kB, but how to browse it?

Nothing. It is like before i set LE settings. No errors, no signs. Is there any LOG about LE?
I can see meshcentral-events database to grow, but where can i see those events?

No, test was also not successful. I was looking for any LOG, but i could not find any

In the UserManual section 11 it describes exactly what i need. No traces of reverse proxy.

I did not understand it that way. Anyway, what guide should i follow to get LE directly from MC?

Th guide inside this manual.
http://info.meshcentral.com/downloads/MeshCentral2/MeshCentral2UserGuide.pdf

As far as i know, NO. Is there any description how to go thru certification?