Hi Neb!
Sorry to react so late but here in the Western Cape, we are being plagued by regular power cuts ...
What happened to me with the
PS Help file was that I had opened it and, after reading what I needed, I had 'minimized' it so, it was present in my Tool Bar at the bottom of my screen (Attachment), but for some reasons it wouldn't react to the F1 key ... After realizing it I just clicked on its Icon on the Tool Bar... and there it was again!!! Keep in mind that if you have many windows open your Tool Bar gets very 'crowded', so, some of the icons might be hidden from view...