Since the new, "improved" version of the meter doesn't work with XP, I'm glad I kept the install file for the previous version. If I decide to install it again (which I doubt, since unaccountable spikes of data burn happen without any change in our actual usage, and the meter only adds to the total usage), I'll use the old one.
We rural broadband users are stuck with expensive, slow, weather-sensitive satellite broadband until better technology comes around, so this is just another example of needing to be satisfied with table scraps, since that is all we are likely to get any time soon. C'est la vie.