
So, from today attempts to download courses using Chrome are being blocked because the Links Corner main site is secure but the server holding the course files is not secure.
The server hosting the course files cannot be made secure (according to the hosting company) and moving to a new hosting package would be an expensive and possibly fraught operation.
So, in an attempt to get round the problem I have introduced an extra step so that the link on the main site doesn't point directly to the download file but to another link.

It's working for me OK so hopefully it will for everyone else. Incidentally, other browsers may not have had this issue.