I've switched my mortgage payment account. I figured out how to make future auto-entered payments correctly come from the right account by following the instructions here:
How to edit loan payment — Quicken
But I don't see how to correct an already-entered payment to come from the new account. If I try to edit the payment from the loan account, I get the error "This transaction was created as a transfer from a split transaction. In order to change it, you must go to the source transaction by using 'Go To matching transfer' from the Edit button." But if I go to the matching transfer and attempt to edit, I don't see any way to change the account the funds come "from", only the loan accounts that the funds go "to".
Can anyone point me to the right way to do this short of deleting the transactions and re-creating them manually?