Hi,
thanks for your question, and sorry for the trouble.
The best way would be to manually uncheck the corresponding checkbox on the table’s “Edit” screen, as that leaves the most flexibility.
You could also force that setting to be turned off using some code that uses a plugin filter hook.
In order to set default values for all new tables, you could use the TablePress Extension from https://tablepress.org/extensions/datatables-off-new-tables/
This can also be used to set default options, by slightly adjusting the code. The available options can be seen here: https://github.com/TobiasBg/TablePress/blob/master/models/model-table.php#L847-L855
Regards,
Tobias