Remove an addon

We need to remove all the objects and code of an addon and install a standard NAV but we need to migrate all standard data from Addon version to the standard version.

Which is the easiest way? Actually the DB is standard + addon + a little personalization (This personalization is easy to copy to the standard).

There is a lot of data in tables with an addon' Field ID, but we don't need them.
NAV Version 2013R2

Thanks