Although, you shouldn't have to get it from there, as it should be available in your generated output:
"RoboHelp copies all the files to distribute into the JavaHelp folder, or into a JAR file if you choose to compile Help."
Thank you for you help, Amebr!
The name of the jar seems to be 'bsscjhrs.jar', not 'Bsscjhr.jar' as mentioned in he text.
In Robohelp 9 there also exists a directory called 'OracleHelpExt' containing a 'bsscohrs.jar' file.
May I furthermore ask what is exactly meant by "Incorporate related topics controls in the topics"?
Thanks in advance.
You can add a control to your topics that when clicked displays other topics that are related. You can add these via the Insert > Related Topics menu item. They are no as widely used these days so if you don't want to use them, you don't have to.