Easy Populate Advanced 3.0.3 Problem trying to re-add deleted items

I'm using ZC v1.3.9h and the paid version of EasyPopulate Advanced 3.0.3.

I imported 520-something products with no trouble, and was using the ZenCart interface to move some of them to new categories. In doing so, I accidentally deleted them from my store. :oops:

The SKUs of the items in question are 600, 604, 611, 612 and 613.

I know a couple of them are still in the ZC database somehow, because I've written some custom code that's drawing data straight from the database. You can see 600 and 604 here: http://www.springwatergifts.ca/printcatalog/gardenaccentspetmemorials.php

The trouble is that none of these items can be found via the admin area of my ZC shop anymore.

They're still in the spreadsheet, though, and when I try to return them to ZC by reuploading the spreadsheet, I get this error:

SKIPPED! - Product Index: 600 - no such current category path for this existing product.
SKIPPED! - Product Index: 604 - no such current category path for this existing product.
SKIPPED! - Product Index: 611 - no such current category path for this existing product.
SKIPPED! - Product Index: 612 - no such current category path for this existing product.
SKIPPED! - Product Index: 613 - no such current category path for this existing product.

I've been tinkering with various category fields to no avail. Is there a way I can either delete them from the database entirely and start over via the spreadsheet, or change the entry in the spreadsheet to avoid this error? I can't seem to figure out what category path is supposed to be listed, because I can't find those skus in my ZC backend to remind myself where I'd originally filed them.

Thanks for your help!!!