Hi Laurence, the icons on the program interface are a bit confusing and do take a bit of getting used to.
After you alter the settings you need to click on the "Download" icon to save the settings to the controller.
Clicking the "Upload" icon simply reloads the settings from the controller into the program, just like it does initially when you click "Connect".
The Acceleration setting is different in the programs because it was modified in the controller to allow more control over the setting.
The original controller could only be set at 20, 40, 60, 80 or 100% which seems to show up as 1, 2, 3, 4 or 5 with the revised program.
So, why are there two different programs in the
Dropbox folder?
Well, when I first tested the front Smart Pie with the vector controller I found the throttle response was too quick and I kept spinning the wheel on rough ground every time I opened the throttle to pull away. I eventually managed to work out how to get the program to connect and reduced the acceleration level to 80% as this was the next available level, but I found it a bit too slow.
I asked GM if the programming software could be modified to allow finer control of the acceleration setting and they eventually sent me a revised controller to test.
I swapped the controller over and was very surprised at how very slow the acceleration was compared to the original controller. I set the acceleration setting to 100% but it still took over 12 seconds to reach maximum rpm on 32V and 27 seconds on 54V.
I contacted GM and explained the problem and they quickly emailed me the revised software to use with the revised controller. I opened the revised software program and connected to the controller and noticed that the acceleration setting was only on 5%, which explained why it was so slow to accelerate. I now have it set to 75% and the acceleration is much quicker than the old controller was at 80%.
So now there are two programs, one for the original vector controllers and one for the the revised vector controllers.
I have left them both accessible as I don't know which of the two controllers people will actually have.
As long as one program works correctly with your controller, that's all you need, but if the Acceleration setting makes no difference, you might want to try the other one.
Alan 
