So I'm trying to get the
4x Water Brick for a build I'm doing. The problem is that no matter how many times I restart Blockland or re-download the file it simply won't show up in the Add-Ons checklist.
Here's what I'm talking about:

It's the first .zip file in the folder.

It should be appearing above Brick_Arch, but it isn't.
I downloaded it on my younger brother's computer and it worked just fine. Yet every time I try it on mine it simply won't show up. My current theory is that having Blockland installed to the D:\ drive might be causing this, but all of my other add-ons work just fine, so I'm at a loss as to why it's only this one that's fsck'd up.
Can anyone help me?