The theme settings do not save the options selected, it ends up on this page https://www.w*******e.it/wp-admin/options.php which however resat all white and does not save the options set.
This issue is caused by the low PHP max input vars limit on your server. You can increase it in PHP configuration. Check your current limit in Dashboard -> WoodMart -> Status. https://gyazo.com/18e01182bcb309ec06c52947423fe9fe
You can contact your hosting provider for help on this matter.