The 2.x code did send a signal home which we used to count the number of installs. It should only run once when you install the software. It then sets a flag and shouldn't ever run again. The email address that it sent home to doesn't exist any more so you would get an email bounce on a fresh install.
No idea why you would get it on an old install tho'
Incidentally, 3.x doesn't send anything.
Kind Regards
S