I own a Sony Reader Prs-600 and would love to create collections on it using Caliber but I have no success. I use the version 0.7.43 because the latest (0.8.11) won't accept my reader. I tried using the metadata to put new tags and all I get is no collection but a duplicate of any book I put a tag on. The worst is that there is no way to erase that duplicate after that because Caliber doesn't see the duplicate.
Can someone please help me to know how to create collections and how to erase the duplicates now in my reader?