This might be a non-platform specific problem.
If the L/R Transporter plug-in is the common item, what if you attempted to 'Check for updates now' or 'Reload Plug-in' within the plug-in (or remove and re-install it)?
Another option would be to communicate with them directly. (www.photographers-toolbox.com/products/lrtransporter.php)
Good luck and let us know how you fixed it.