Your files stay on this computer. The database and statements are read inside this browser window and are never uploaded. Only your column choices and match decisions are remembered here, so next month starts where you left off.
I’ve guessed the transaction table and columns from their names. Check the preview: you should see real GL entries with dates, amounts and account numbers.
Load the database first.
If the database only holds this fiscal year’s entries, the computed GL balance may miss the opening balance. Enter the cash balance from the PowerChurch balance sheet to override it.