AbleCommerce Shopping Cart Software

I have over 20K items that I would like to remove from my site - they are duplicate items that were uploaded via the data port tool and I am still not sure how/why they became duplicate.
I spent the weekend trying to find an easy way to remove these but it does not look like there is an easy way. I would like to either remove this batch or remove all items and reload. Is this possible?

Please restore the database from the backup and try to re-upload the products.
If you get it reproduced then duplication issue must be reported to AbleCommerce and also in this case it would be very handy if you share some of those products which get duplicated each time you upload.

Are all the products in 1 category? if so, try deleting the category and that should delete the products.

If that doesn't work, than you're right, there ought to be a way to mass delete products. It would be nice if there were a way to move all of the products from one category to another, then you could delete the wrong category.