For me it looks odd being there (above the download button) mainly because I think the download button clashes with it. Not to mention it feels cluttered in the top right now where before it didn't. I also feel the breadcrumbs should always span all the away across until it meets the side block, no exceptions.
I think the add new version button location can be better placed away from the download button. where? not sure yet but I think this isn't the place it should be.