device agent

I am on a new late 2014 iMac tied to my Computrainer. I am trying to get my Zwift fit files into T/P device agent , but every time I try it say I have an incompatible usb driver  FTDIU required for Computrainer and  this stops the whole process. 

download the fit file and log diectly into Training Peaks and load the file that way, no need to use device agent

thanks I have done this and it works. I am an older guy so not to computer savage.  I am also having issue that because of the ftdu usb connection that device agent is ask me to disconnect. i am using a computrainner. early pro module like 1995 vintage. In device agent I have 2 choices to disable or remove . If i disable i have found i still need to reinstall drivers, so I am confuse between disable or remove usb device. have you or any one seen this before?