I converted the help file that comes with FL Studio 9 into a PDF document. If you would like a copy download it here. It is a large file ~40MB. Right click the link and choose 'save target as' to directly save it. If you click the link to open it, be patient.
Some people reported this needing a password. It does not need a password. I think the problem may have been my download source. So I changed that. If you had a problem with it please try downloading it again.