You'll need to send out DAT scores to every school you are applying to this cycle as schools do not reliably hold information from previous cycles. If you want to save the $25 on resending the scores you should call the school and make certain they actually have and will hold onto your scores for the current application cycle. Otherwise, you'll end up putting $$ for AADSAS, possibly a secondary app and fee, and still have an incomplete application because they didn't keep your old scores on file. I would go with the overkill and have them resent from ADA.