On September 24, 2020, Apple finishes the review of version 13.7.0 of PDF Notes S & PDF Notes C and they became Ready for Sale.
On September 24, 2020, I uploaded version 13.7.0 of PDF Notes S & PDF Notes C to App Store
PDF Notes S https://itunes.apple.com/app/id961336139
PDF Notes C https://itunes.apple.com/app/id1459073729
This version has re-designed open in new window via long-press menu (iPad only), improved vertical page turning through thumbnails view, improved outlines & bookmarks & annotations list, improved page link destination picker, improved search results, improved undo & redo, improved zip & unzip & zip preview, added cross-license simulation, and the other improvements.