Mica, thanks…clicked on it and Windows Defender blocked it 
Is that Defender just being over-cautious? It was quite happy when I downloaded the ealrier version through the link on the Darktable website.
What should I do?
I kown this is all everyday stuff to you Linuxy types but it worries and confuses me!
PS I know I’m slightly trying to have my cake and eat it by enjoying the AMAZING effort put into free stuff like DT but also relying on the internet ready-meal Microsoft offers…