What DBMS is used by nlbwmon

Hello friends!

I have up trying to make Yamon work and am testing Netlink Bandwidth Monitor / nlbwmon.

I had installed it and set the location to save its DB. Then I copied it and am trying to open to see its contents, but I can't figure what DBMS it is.

I thought it was sqlite, but when I try to open it with DB Browser for SQLite it fails.

The best I had found is to run nlbw -t 2021-12-01 -c csv, it prints the DB contents as csv, so I can save it on a txt file then read it elsewhere.

I had read its documentation on https://github.com/jow-/nlbwmon. I was hoping to be able to save all the data on a unique sqlite file, which I could read directly from PHP.