If Eligius doesn't have your bitcoin address then they won't be able to send you your bitcoin so you should update it asap.

"To use, just point your miner to stratum+tcp://stratum.mining.eligius.st:3334 (or http://gbt.mining.eligius.st:9337 for GBT) with username set to the bitcoin address you want paid."  You can keep the password blank or put anything in that field."