B4A v3.20 is a very old version. It is likely that new libraries will not work with it. I don't know whether JdbcSQL will work with it or not. You need to try it.
Excuse the ignorance, but if I buy the new b4A in the package I also have B4J or are they two separate things?
To use JDBC I have to necessarily have B4J or even with B4A it goes the same.
Thanks for your patience