Hi folks,

Each upgrade is indeed a self-contained unit; I don't make any
assumptions as to which upgrade(s) you may have installed previously.
This makes the upgrade files a little larger than they otherwise might
be, but not by much.

Laren, the updates won't do anything destructive to user datasets
that you've previously installed, or to much of anything else. The
update ZIPs should go in without causing "disturbances".

I do know that there are a few people who back up everything in the
Guide directory first, then install the update (as Bill Foley mentioned).
In theory, there should be no reason to do this... but it can't hurt.
Incidentally, Guide installs nothing outside of its own directory.

-- Bill