Hi Ilia,
Thanks for the reply - you're correct about what I'm trying to do!
I've tried your first option and unfortunately the following dialog pops up:
"Unable to write file $FILE$ (file may be write protected)"
This dialog does not appear if the file is saved manually with the File -> Save Project As... Dialog
The save location is a network drive. Let me know if theres a workaround?
For your second option - is it possible to specify the exact filename here?
EDIT: It looks like you can also specify a filename here, which has worked - thanks !