Can not control the MDC2260CS via Roborun+

I have installed the latest version of Roborun (V1.5 oct 10, 2015)
I am using windows 10.
I manage to connect to the controller via USB (com3)
The status shows that I have firmware "Roboteq v1.2 RCB400 05/31/2013"
Controller Model ="Missing" (in the upper right corner)
Configuration tab: Input/output working as it should. Power output is empty
Run tab: Command area is empty, can not give any command to the controller.

When trying to upgrade firmware. I choose "Update controller firmware via USB" on the Console tab.
I get the Roboteq DFU loader. Here I can chose the lastest Firmware v1.6
But the three buttons "Upgrade" "Abort" and "Quit" are all grey and not possible to click.
And the drop down meny "Available DFU Devices and compatible HID Devices" is empty, noting to chose.

The Stat LED showing Idle - Waiting for command
And when I choose upgrade the LED start to flash faster "Short detected"

Any idea what might be the problem?

/John

Thank's for quick replay.
I tried those steps. But Roborun did not manage to find any com port.
I have a USB to Seriall adapter "Prolific USB to Serial Comm Port (COM5)"

/John

Yes I manage to download a new driver for Prolific. Thank's
Now Roborun found the USB to Serial adapter (COM5)
I start to download of the new firmware, but get the following error after a while

"Controller found on COM5"
"Reseting the controller - Done"
"Waiting for device restart - Error"
"Device starting String not detected"

And Roboteq Motor Controller (COM5) don't show up under Ports
I see Profilic USB to Serial Comm (COM5) instead.

/John