I purchased this extension many months ago, and it has yet to work correctly. I needed to be able to restrict delivery to certain dates (only a future Tuesday or Thursday). Every time I open a support ticket, I am asked for my administrator login details...and then the extension is uninstalled / reinstalled. After a few orders, I will get one with a delivery date that SHOUDLDN'T be available. I've given up on trying to get support from the author and am trying to fix it myself.