If you have installed FulGaz on your Windows 10 PC or laptop and the app is not recognising your ANT+ devices, it may be a driver issue on your machine rather than an issue with the FulGaz app. Your PC or laptop can't see the ANT+ devices, therefore FulGaz can't see them either.
While we are not 100% sure why the following solution works, it does seem to fix the problem for many users of ANT+ devices.
On some Windows 10 machines, the ANT+ USB adaptor/dongle doesn't work unless the correct drivers are installed, this can be achieved by installing Garmin Express. You don't need to use or sign up for a Garmin account, simply install the device on your machine. This installs the necessary ANT+ drivers and enables your machine to pick up the ANT+ signals via the USB dongle.
A note for Mac: FulGaz for Mac does not currently support ANT+ devices, it is Bluetooth only. This is something we are working on with Garmin.