Hi,
Ok, let's first replace this line of code with:
if(HIKASHOP_J30 && (($app->isAdmin() && HIKASHOP_BACK_RESPONSIVE) || (!$app->isAdmin() && HIKASHOP_RESPONSIVE && $configClass->get('bootstrap_radios','1')))) {
we'll do that on our end too.
Then, you can simply add an entry with the namekey bootstrap_radios and the value 0 in the table hikashop_config and that will deactivate the bootstrap radios even when the use bootstrap design setting is activated without needing to change the code each time you update.