I'll echo By-Tor, thanks for the quick fix even though I hadn't personally run into this problem (yet).
When an upgrade is relatively minor, like this one, have you considered the possiblity of offering some kind of incremental upgrade for those of us who already have the most recent previous upgrade, possibly a patch? That way it wouldn't be necessary to download the full 2 megs (with manual) and re-install almost from scratch.
I realize that this would be difficult if not impossible if changes are in the main exe, but could be very handy if the only change is to smaller files such as dll's.