Hi, astra. You don't need the Reader Library to export notes from the handwriting application. Here's what I do:
1) Notes created in the handwriting application are stored on your ereader in the folder: database > media > notepad. Plug in your ereader via USB cable, and go to this folder. You will see files with a long string of numbers and the extension ".note".
2) I copy the .note file over to my hard-drive.
3) Then I rename the file extension from .note to .svg.
4) Then I open the renamed file on software that can read SVG files. For example, I open it in my Safari web browser. I have read that Firefox and Chrome work too. There is also a free Adobe SVG Viewer, which is a plug-in to your web browser if these options don't work for you.
5) Then I print to PDF. If you have the right software, then you can edit the file as well.
There are alternative methods discussed in this thread as well:
https://www.mobileread.com/forums/showthread.php?t=67714