UPDATE: It looks to be some form of permission issue purely on that directory. As a test I set it to 0777 (not for production) and the database configuration completes.
Sorry about all the updates, but trying to be helpful to anyone else who has this issue
4 of use clubbed together to pay for it, now it is free to all our pilots.
It is very good and the writer is working on it all the time improving.
Well worth the money in my view.
regards
Doug