I feel like a third grader sitting in on a college course sometimes if things are not just plain black and white elementary. So sorry for that. But here is the question, can you actually delete a collection with the Kobo Utilities?
I have several collection's that I am trying to delete. (And I have not done a sync with Kobo) I have tried actually deleting them on the device and then connecting to Calibre, then opening the utilities and making sure that the collection does not show and then click the 'OK'. But occasionally they keep returning. I even redid these steps and selected the purge option, yet they are still coming back. Then I tried connecting to Calibre and opening the utilities and then finding the rogue collection. I can highlight it, but can not figure out how to select delete.
I am not sure what it is that I am missing and apologize for being such a pain.