From Rob's previous post:
* Installation
Download either the consumer or developer images and emplode (or emptool) from the empeg-car upgrades site.

You should install the new emplode or emptool before installing this
release. If you fail to do so your empeg-car unit may not function and it
will be necessary to apply the upgrade again using the correct version of
empegUpgrade or upgclient.

So I'd say it needs the new emplode/emptool to be certain it works correctly.

Dave Clark
Austin, Texas
12g Blue MK2
S/N was 80000329 -> now 90000970