The problem is that when I try to export through theme manager I get an error: "Cannot copy file: Cannot read from sourcefile or disk"
Is there a reason for this? I'm exporting from v.1.0.4 "Lanai" which is probably quite an old version but it was working fine so "if it ain't broke...", although it does seem to be broke

It's not a big issue as long as I can copy/paste all the code in the templates & stylesheets...but it will mean that I'll have to test thoroughly before I go live just in case something didn't copy correctly.