F1 doesn't work.
A search in the help file tells me to 'see the online help pages'.
Searching the online help pages allows me to find pages which tell me to see the online help pages.
How do I find the help page for Channel Tools?
In general I find the help system pretty frustrating. I hope this is something that is addressed in the next iteration of the software.
[edit, sorry was getting confused with the 'always use offline help' settings bit, my brain's a bit frazzled after trying for ages to find the above help page]