Have indeed. The current uploaded version is buggy anyway and for some reason we cannot build workers.
Perhaps try extracting the civmod file into it's own file - that should make it appear.
If you have 7zip, the best course of action is to right-click on the downloaded civmod file and select "Extract to file". That will give you a folder called "Australia ft. Henry Parkes (v2)" that will look like all your other mods.