Thank you very much for buying the pro version of the theme.
Please find answer to your queries below:
1. I would like the customer who makes the request for information through the ENQUIRY form, he also receives his request in your Email BCC, not just the administrator
Response: Currently the feature is not available in the plugin. But we will note it as the requested feature and will work on it.
2. I would like to remove the newsletter subscription request form ENQUIRY (see photo)
Response: As for now the message could not be deleted. But in the next update of the plugin, we will make the enhancement like add filter so that it can be removed.
3. I updated WPTravel and WPTravel PRO and lost the translations I had made with LOCO Translate (following your instructions) how should I do to avoid losing them in the next update?
Response: The issue is quite unlikely to happen. The issue may have raised because you may have kept the translated file in WP Travel plugin itself so upon update it is deleted.
So make sure to keep the translated file inside folder wp-content > languages > wp-travel.
In this way nothing will be lost upon update of the plugin.