We would like to inform to the users who are still using previous layout i.e. v3 layout (the layout before v4.0.0) to migrate the trips you have created using WP Travel versions before 4.0.0 as we are going to remove ‘Switch to V4‘ option in settings page from WP Travel v5.1.0. You can migrate trips through Migrate Pricing and Date option by going to Admin Panel > WP Travel > Settings > Debug
Note: The existing v4 trips can be overridden as well if you have created any.

Once the trips will be migrated and migration completed message will appeared , please don’t checked in Migrate Pricing and Date option again.

To verify the value you have set for the trip options after completion of migration, please go to Admin Panel > WP Travel > Settings > General, enable ‘Switch to V4‘ option and verify the value you have set going to individual trips.

Actually, we had provided ‘Switch to V4’ option in WP Travel v4.0.0 so that user who have used WP Travel plugin with previous version(before 4) can switch to version 4 or can stay to same version(they have used) even after updating WP Travel to version 4.0.0 and further. We had came with date picker option to display the available dates for the booking of trip in WP Travel v4.0.0 so for the user who don’t want to move to new layout (calendar form) and want to stay at previous layout (date listing form) we had provided ‘Switch to V4‘ option.
But now, user don’t need ‘Switch to V4‘ option to stay in previous layout updating plugin to latest version as WP Travel v4.6.0 has included date listing feature which display the lists of available dates for booking of trip as in previous version with few enhancement . So, we have decided to remove the ‘Switch to V4‘ option from WP Travel v5.1.0. For detail assistance regarding date listing feature, please refer below.
