templatename in file upload not working

[mikeatcityuni]

Hi, perhaps I have misunderstood use of this but ... if you use templatename on creation of courses using file upload then it all works as expected. However, I wanted to apply a template (just containing some blocks) after the courses have been created. I have prepared file upload with templatename field and shortname of my template course, using update existing courses option ... nothing happens. Have I got this right?