Database Format Change (from Beta)

It appears that the database format has changed between 3.0 Beta 1 and 3.1
(Final).  Is there any (simpl) way to convert a 3.0B1 database to 3.1?

(The plaintext export/import is also failing)

Thanks.

(I apoligize in advance if this query is better suited for the "users" mailing
list; I sent it here in case another developer has already dealt with this.)

Robert