I've resolved the issue, have .net 4.5.2 and turned off windows update. I will manually check for windows updates and only install files not associated with .net 4.5.2.
I have spent hours with this problem and although there are several threads on this subject, surely it would make sense to list the fix in a topic? if you haven't already I've been all over the place for info and really cannot remember if there is one.
On my computer I now have several c++ re-distributable programs, do I need the all? my oldest being C++ 2005.
I'd like to say thanks for the help, but you haven't apart from deleting my original request as it was allegedly in the wrong topic, but on checking the top thread shows support request?
I also understand it easy for me to complain, I'm sure I, (we) do not realise the time and effort put in in producing this fantastic (when it works) Mod. perhaps the option to allow old versions to be downloaded could be considered, As I'm told ELS8 doesn't work? so I'm reluctant to do any other mods, and just stick with what works