I found a work-around that may be of some help. It involves using GREP to find the last dot in each number, and replacing it with a dot plus a hair space. You can then align on the hair space. Not perfect, but it could work.
the grep is
find
(\.)(\d+)(\t|$)
replace with
$1~|$2$3
then copy one of the thin spaces, and paste it into the Align on box in the tab bar.
