Hi,
It requires a modification in the "components/com_hikamarket/views/productmarket/view.html.php" to replace
$pageInfo->selectedType = $app->getUserStateFromRequest($this->paramBase.'.filter_type', 'filter_type', 0, 'int');
Into
$pageInfo->selectedType = $app->getUserStateFromRequest($this->paramBase.'.filter_type', 'filter_type', 1, 'int');
But because it is a core file, you will lose your modification with the next update.
So, I suggest to use an hidden configuration setting instead :
$pageInfo->selectedType = $app->getUserStateFromRequest($this->paramBase.'.filter_type', 'filter_type', (int)$config->get('default_filter_type_product_listing', 0), 'int');
Thanks to that you have just to create a new entry in the "hikamarket_config" table for the namekey "default_filter_type_product_listing" and put "1" as value.
And that setting will be added in the HikaMarket hidden settings.
Regards,