Please refer to the following FAQ article as the ActiTrainer and the GT3X/GT3XE use the same USB controller. The same procedure applies to the ActiTrainer devices.
If you need any further assistance, please go to our support portal at https://help.theactigraph.com/home. From there, you can view many helpful FAQ's and Troubleshooting Articles; log in to check any existing Support Requests; or create a new Support Ticket if you are unable to find a solution. You can also email us at firstname.lastname@example.org or give us a call at (877) 497-6996, Monday through Friday, 8 am to 5 pm CST.