Hi Alva - thanks for the comment. Is this in reference to the first full release - v1.0? And what link are you clicking?
In the meantime, all that DER-VET requires is a single column with no header and the correct number of rows (e.g. 8760, 8784, etc.). As we work to correct the template download issue, you can create your own files very easily like this.
I made a FAQ entry for this. I expect you're the first of many who will run into this before we can fix the issue: https://storagewiki.epri.com/index.php/DER_VET_User_Guide/FAQ
We also posted the templates on the website, so you can download them from here: https://www.der-vet.com/help/