The Draken 4.1 Flight Manual is constantly updated to reflect the changes made during development, and is always valid for the latest beta version (including patches). The online version and the pdf version are usually in sync as they are generated from the same source files. However, you should be aware that if you downloaded a pdf manual some time ago it might contain information that has since been revised.
The most recent addition to the manual is a basic instruction for flying an approach using the PN-59 unit and the Barbro navaids. PN-59 navigation was broken in 4.1b3 (sorry) but has been fixed and will work perfectly in the released version – which is just a few days away. 🙂
Stay tuned /Tom