This *IS* the newest version.  I don't have any other add-ons added, and this is the very first time I downloaded, and installed, the hookshot add-on.  While I shouldn't expect you to have known this, I certainly wouldn't have posted without trying to figure it out first (huge blockland fan, and have used it frequently in the past).  I made sure this was the most recent one.  Checked the thread 3 times to be sure.  I've also not installed any other add-ons, simply because I wanted to be sure that this one would work correctly.  I haven't done anything to the BLR (demo) install, except add maps, and this add-on.
According to what I can see, it's messed up, and hasn't been fixed.  If I can do anything to help fix this, please let me know what I can do, and what needs to be done.  Mouser X over and awaiting reply.