phpBB Auction isn't a product of phpBB. It's a third-party add-on for an absolete version of phpBB. Your best place to ask is here
On a side-note: since the last plans are 2½ years old, I don't think there's much to be expected.
Above message may contain errors in grammar, spelling or wrongly chosen words. This is because English isn't my mother tongue. My apologies in advance.