Database change, now insert/uploads don't work

For reasons too tedious to go into, I had to change the db set up for a client's site at final testing stage. I'd originally had two databases, but his hosting plan only allowed for one, so I've had to add the 3 tables from db no. 2 to no. 1. So far so good - most of the functions are unaffected as all that was involved was a change of database name here and there.
However - the insert/upload behaviors on the admin pages that I created for him no longer work, and I can't figure out why. Basically I want to avoid having to re-create these all over again tied to the new database if I can avoid it. I assume that there must be something that WA DFP does in terms of coding which I ought to be able to change (in one of the helper pages for example), but I can't see where this would be. Does that make sense? The old database name was srs_clients, the new one is wealthadvi1, but I can't see anywhere in anything that was generated by the DFP upload process that I change the old name to the new.