History Collection plugin helps you collect and display daily historical entries on your WordPress blog.
We decided not to add this as a function, as the risk of accidentally erasing everything was just too high. But there is a work around.
Download your entire History from the database using the Import/Export screen. You can then load it into Excel to remove duplicates, find spelling errors, and so forth.
Then, once you're ready to re-upload the listings, you can go to the Listings page and use the Bulk Action to erase your listings. Yes, if you have multiple screens of listings, this could still take a long time.
Once they're all deleted, you can re-upload your CSV to get the listings back.
Just be sure your CSV is ready to go. Once you delete them from the system, the only way to get them back will be to re-upload them. Be careful!