Cannot save to Evernote
The problem may be with the credentials stored in the Keychain. You should be able to resolve this by:
1. Choose Go -> Utilities from the menu in the Finder
2. Launch the Keychain Access application
3. Enter "PDFpen: Evernote" into the search field at the upper right of the window
4. Select the "PDFpen: Evernote" entry or entries
5. Choose Edit -> Delete from the menu
6. Confirm the Delete
7. Quit and re-launch PDFpenPro
8. Try saving to Evernote again
If you are still having issues, sign out/back in again and re-authorize. Once authorized, it should populate those notebooks.