ToME: the Tales of Maj'Eyal

The game is blocking me, quite sensibly, from retrieving items from "previous versions" of the game. However, this leaves me in the position that I cannot withdraw a large amount of my Vault items, not even to melt down for gold or throw away. So how do I clear up space for stuff from the current version?

You can delete items by logging onto your profile at te4.org. No gold though