I have got out of the loop by accident.

After several more bad-tempered attempts Poser crashed and wouldn't restart from the desktop shortcut. I restarted it from the .exe file on the P7 folder and it launched to the Factory State. 
WW had vanished from the Window/Scripts dropdown, but if I click on one of the empty slots at the bottom of thedropdown it will let me start WW by browsing to the folder and clicking on the WW Menu.py file. Carefully reset to my Preferred state and it is still going (cross fingers).

AntoniaT's point ; I wondered about the clothing being the problem. Now it is working again I will follow this up with pieces from different sources. From everyone's comments it seems likely most will work and I will be off to PhilC's site to see about getting it.

Thank you all