If you are referring to the internal help files of the program, they are non-functioning at this time. Scirra crew has said they are working on this and it will be appearing in a future release.
If you are referring to the 404's on the site, I believe the broken links are a result of migrating from their old site and I don't know if they have plans to update the links or not.
They are really great about offering help though, so if you hit a snag, just post your questions and someone will usually respond pretty quick and help you out.
Have a nice day!