New feature : Change field type AFTER instanced
With this new feature, you are not forced to remove and recreate your table field when you want to change its type.
It has been a long job to do because the builder was not able to do it due to all the cascade restrictions of the builder (wizards, Icons refresh, Fields tree icons and expandable nodes, ...)
To change a field type :
Open the properties box, and change the 'type' parameter.
Sometimes, the list of possibilities can be restricted by the wizards using the current field you want to modify.