Hi looking for help with setting the voltage limits for potentiometer control!

 I am about to buy an AX500 and I intend to use an Apem Series 5000 joystick with it.

I have read this:
  http://www.websitetoolbox.com/tool/post/roboteq/vpost?id=2209727 
...and there is mention of a beta programme that allows custom voltage limits to be set for potentiometer control!

Is it still in beta or is it normal software now?

I tried to download and open:  http://www.roboteq.com/files/software/beta/roboup20u-042606-elco.zip

But no luck! (no mesh found in file...whatever that means!)