For more information on how to easily switch from the old and discontinued WP-Table Reloaded plugin to TablePress, please follow the migration guide.
Even if everything is working fine with your WP-Table Reloaded installation, it is highly recommended to switch to its successor TablePress.
As WP-Table Reloaded will not receive any further updates and is no longer supported, switching to TablePress is the only way to make sure that everything will continue to work fine!