Hello again, it may be true that the standalone addon manager would not cause trouble but What I was also doing wrong was mixing it with OLD downloads. So I was not getting the message that I should download the latest copy of each addon. Once I understood this and downloaded all the latest files the PHNL installation places itself with the addon manager in the place I designate and each subsequent addon just saw where to place the new files.
Completely different to what it used to be.
Now I have PHNL and Hawaii1 and 2 and GSX all working. Sorry for causing so much confusion. I will impose a penalty on myself and browse your nice website to see if there is another scenery I can add.