Thanks Jass – but that is not the problem. See the screenshot. This shows that the file is 4kB. But it is not – it is 15MB.
However the download does now work – the only problem is that the user thinks it is a very small file.
Updated to DM 2.9.2 and – still shows file as 4kb – download works!
So – can now use DM again – only problem is size of file shown is incorrect