Actually, the latest version v4.0+ of the WP Travel plugin provides the ‘Switch to V4’ option to updates the WP Travel plugin settings from the previous version to the newer settings built in React of WP Travel.

After updating to WP Travel latest version(after 4), your plugin setting will not immediately upgrade to the Version 4.
For new setting, you have to enable ‘Switch to V4‘ option by going to Admin Panel > WP Travel > Settings > General

So, if previous setting is being displaying even after updating WP Travel to latest version(after 4), please make sure that ‘Switch to V4‘ option has been enabled by going to Admin Panel > WP Travel > Settings > General

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