I just recently bought Argen as I am learning Xojo and wanted to start a database project.
Then Api 2.0 came out so I emailed BKeeney Software to ask if they had plans to update it and they said :-
"We have no immediate plans to go to API 2.0. I would expect a new version Q1 of 2020.
FWIW, API 1.0 will be valid for many years so there’s no big hurry to switch."
Such a shame as if you start a new project now then it's 2.0 by default and you can't go back, plus I don't want to learn an old Api just to switch in a few months.