Another update to this issue…
I have now got the new compiler version to work with my set-up. Following the WOW thread in the Chatter forum, which I was accused of hijacking, I have compared the wdisplay.ini files from the current version & the new compiler version, having done a fresh install in a new folder & using the 2wd.txt file.
There was in my original wdisplay.ini a load of settings that came under the heading of [WS2000] that didn’t appear in the wdisplay2.ini for the fresh install, so I removed the data and it now works, so I have managed to update my old pre new compiler version with the latest one.
Now I’m off to sign up with WOW!