If you're on the original version of A2C (22.214.171.12467 or thereabouts) and were thinking of relying on the "hey, look in this folder and upload any entries" feature...
Don't. It doesn't work.
There is a new version that fixes this available here: Downloads
JCQ were unaware of the issue or the patch availability when contacted, but hopefully they'll be pulling something together to send out to Exams Officers.