Has anyone ever done it? Do you just buy the DVD and remove the old and insert new?

 

Yup, just buy it and eject your old disc. Pop the new one in and roll out.

Put the old one on CL to sale or ebay, make some of the money back.

 

next annual new version of the dvd will be coming out in the next couple of months. may not may not be material differences for where you live or drive, depending on timing and how much new development. just something to be aware of if you want to have the 'latest'.