I don't know anything about a "new manual for newbies" beyond the fact that there have been requests for such. I have elected not to write one because, as I've stated many times in this forum and elsewhere, including the AIFP user manual, such information already exists in the form of the TTools User Manual. (Given the general aversion to reading user manuals and given that there is already nearly 70 pages of user material spread across two manuals which, apparently, almost nobody reads, why would I write another that, for the most part, would simply duplicate what already exists in the TTools manual?) I'm glad I got that "off my chest".
You will find a link to the TTools user manual on the AIFP page of my website. That manual is also included as a standard item in the archive for each new release of AIFP.
Your specific issue is addressed in the penultimate paragraph of Section 7.1 in the AIFP User Manual. But, to save you the time, in a 4hr repeat flight plan, only times between 00:00 and 03:59 are valid. Such a flight plan runs every 4 hours during a 24 hr. day, i.e., at 01:00, 05:00, 09:00. 13:00 and so on.
As RobyStar says, you can't start a 4 hr. flight plan at 09:00, by which, I presume you mean you don't want it to run at 01:00 and 05:00. If you want the flights to begin only at 09:00, you;ll have to use multiple 24hr plans. That's the way FlightSim works.
Don