If you have downloaded the Add-In contained in this thread and used it let me know if it successfully listed your Route features and updated the 3D measures or if you had any problems getting it to work.
There probably could be a 10.0 version if I was able to compile it on a machine with ArcGIS 10.0 installed, However, no one has that version where I work now, and I don't have administrator rights to install it myself. I don't have a good case to ask IT to install if for me that relates to my work.
If you can upgrade to 10.1 or 10.2 I think it is very much worth it. Either of those versions is much more stable and has much better performance than 10.0.