Roborun Download for AX2550/Controller not recognizingNew 15-pin to RC plug

I need help. I've got a roboteq AX-2550 running an old robot, and I just purchased a used AX-2850 to run another one. I cannot find the download for Roborun, just Roborun+, which doesn't recognize the older controllers, and I need to adjust the coast on the 2850. I also recently purchased a 15-pin to RC from Roboteq for the 2850, and the controller won't recognize the remote receiver, although with the older 15-pin plug it will. Any suggestions?

We no longer support the AX series unfortunately. I recommend upgrading to the HDC2460.