Hello Rutlap!
Welcome to the Canon Forums and thanks for posting!
We're sorry to hear you're having trouble with the CameraWindow app. We want to help. We have recently released an update and your PowerShot G7X should be compatible with the CameraWindow app using an USB cable. Please download the latest version of the app which is CameraWindow DC 8.10.9b HERE. If you need additional assistance with this our Technical Support Team can assist you by phone at 1-800-OK-CANON. They are open Monday through Friday from 10 am to 10 pm ET, excluding holidays.
We hope this information was helpful!