Delicious Library is now sandboxed, to comply with the Mac App Store security rules. The database folder is located in your Home directory. To find that folder:
1 - select your Home icon in a Finder window
2 - In the MenuBar Select Go > Go to Folder... (you can also press shift-command-G).
3 - Copy & Paste exactly this path into the search bar that pops up:
~Library/Containers/com.delicious-monster.library3/Data/Library/Application Support/Delicious Library 3/
4 - You ONLY want the Delicious Library Items.deliciouslibrary3 file. Ignore all other files
5 - Copy that file to your desktop
6 - You can then trigger the Bookpedia import again by dragging that Delicious Library Items.deliciouslibrary3 file over Bookpedia dock icon or Bookpedia itself or select it in the File > Import
OR and these are your easiest less techie options
In Delicious Library 3.0:
1 - File > Export To > Another Application.
2 - Choose XML > Export 'Entire Library'
3 - Drag that file over the Bookpedia dock icon or Bookpedia itself to trigger the Bookpedia import again or select it in the File > Import
1 - File > Export To > Library 1 File... This will create a folder with a Library Media Data.xml file in it
2 - Drag that file over the Bookpedia dock icon or Bookpedia itself to trigger the Bookpedia import again or select it in the File > Import
The above Bookpedia import actions will create a new excluded collection with the imported entries for you to review. If you are happy, you can make them all part of your main library with
File > Include Collection in Library. You can then remove the imported collection as the entries will not be part of your main library.
Hope this makes things clearer and you have success
I tried DL1 all those years ago, hated it but quickly found the Bruji pedia's
