After BoA migration - have duplicate transactions - how to fix?

Question

After updating my Bank of America accounts, the transactions for my savings account were totally re-entered.  I never reconcile the account, it is simply an accounting of my balances (deposits and withdrawals).  The account now contains many duplicates which I can never identify.  Can I create an export of just the savings account from the most recent backup and import it into the current file which has the duplicate data.  Do I need to delete the data currently in the bad account?  What file format do I use for the export/import?

Ps56k2 · Answer

[EDIT] - I have updated the topic title to better reflect the actual Q&A 
I would think there would only be a few transactions for a "savings acct".If so, you should be able to manually just Sort by date, or amount or ?? - and see the dups - and delete them.

Chris_QPW · Answer

I suggest that instead of trying to export/import from a backup for a single account (which is very difficult to get right) that you consider doing this another way.  Here are some possibilities.* Select the gear icon menu in the register and then select "Sorting Options" -> "By order entered".  This will group all of the transactions that just downloaded at the end of the register.  Hopefully that will allow you to delete the old duplicate transactions.
* Another way is to restore from a backup and do the update again, but this time before doing the update make sure the account is full reconciled.  That way whatever downloads will not have the R in the Clr column and will be easier to find and delete.