Just to save some searching time, I believe all eUpgrades acquired up until November 1st are set to expire at the end of the current elite year - February 28/29th.

Any earned after a specific date, are valid until the end of the upcoming elite year (2014).

When you do search, you'll see there are Aeroplan games that some people play to try to extend their life. August was lucky for you - most of mine were earned after August, so I have about 60 expiring soon.