I just updated a Windowblind Christmas2016. It appeared to upload but the only one that shows is still last year with last years date.
Did this 2 hours ago and have done it many times so it's not like I did anything wrong.
The problem now is no one be be around till Monday. so instead of me uploading it again I will wait. In case my was an update so I clicked "Edit on my original WB and did it that way as that is the correct way.