Greetings Everyone,
Success! But it wasn't easy. I'm pretty certain that I will eventually add WiFi so I decided to upgrade my Rev. L, TIU to V5.0. I amassed all of the required hardware, (and software) and cautiously proceeded. So, the TIU up graded without a single issue, however, you MUST follow the instructions to a "T" (don't ask how I know). The remote, on the other hand, required several attempts. Everything was checked and the instructions were followed to the letter but the program kept timing out and I would have to start over. The farthest I got (the 3rd time) was 68% when the program timed out and I had to start over again. This time I went back to the Protosound2 site and again downloaded the software and updates, re-installed the "Loader Program" and proceeded to upgrade the remote. Wo Hoo, this time it worked! I don't know what I did different but I do know that I have a TIU and Remote with V5.0 installed! Perhaps one of the more learned members of the forum could opine about the conundrum I experienced while attempting to install the upgrade in my remote........Or not.
Chief Bob (Retired)