Dear All, thanks for your thoughts.
I have a really fast internet connection. Virgin
I am using Fasthosts - have done for years.
I also have a site which is hosted by GoDaddy. Now, the FTP with that is okay...
This issue happened before 16 upgrade. I thought by upgrading it, it might 'clear' the blockage!
Running as administrator? Tried that, makes no difference
Filezilla. I actually exported the whole site from Xara to HTML. Then separately upload the site via Filezilla FTP.
Any more thoughts, much appreciated.