Since the v5.0 Beta will strike in the near future we have started to draft a new manual. As mentioned before this manual will also include a detail description of the new security functions. As usual it will take some time before the v5.0 is developed enough to work in a professional environment. Therefore, for the new manual release it makes sense to wait until a stable version.
Probably most users will stick with v4.2 in the meantime. That motivates to continue in maintaining the v4.2 manual version.