release notes are with the download, in case you missed them. here is the link. ( if your machine is running great and you don't see any features that interest you and you don't need support then no need to update. )
http://www.centroidcnc.com/centroid_diy ... _notes.pdf
i dont' see the big deal with entering metric values (mm) for a metric (mm) setup... as i explained in the "how to setup for metric (mm)" video.
and you can use Swissi's metric conversion work around method if you follow his instructions to the T, or you can just google "inch to mm"