I recently had the somewhat common experience of needing to re-import data into Quicken because my Credit Card bank produced a QFX file with the incorrect dates. Of course Quicken would not let me re-import the data from that time period because of the for-mentioned issues (I presume). What did work was to override the existing file with the restored recent backup file. I could then generate a correct QFX file from my Credit Card back and import it into Quicken. Fortunately, other than import another QFX file, which was easy to redo a second time, I had made no changes to the working file from when I created the backup, .