After purchasing the WP Travel Pro plugin, you will get the license key. You need to add this license key and activate the license by going to Admin Panel > WP Travel > Settings > License.
Note: To add the license key as mentioned above, you have to activate WP Travel Pro plugin.
For your information, the license will only work for a single domain. You cannot use the same license key for more than one site.
Note: In the case of a multisite setup, the single license is valid for all sub-sites if the license is network-activated.
For more details, please watch given below YouTube video
Further, if you have any queries, please submit them to our Contact page.