The "Plus" edition includes advanced features not found in the standard version, such as:
: Introduced a 'Delete but Retain Children' feature, allowing you to remove a parent bookmark while keeping its sub-bookmarks. PDF-XChange Editor Plus 9.5.367.0 | Portable | ...
: If you use a single-user license, you can typically use it on one primary desktop and one secondary portable device like a USB stick. The "Plus" edition includes advanced features not found
: Added 'Expand All' and 'Collapse All' buttons to the Advanced tab of the Metadata dialog box. PDF-XChange Editor Plus 9.5.367.0 | Portable | ...