I'm using WSPR 2.0_r1714 with an Icom IC-7600 via the 7600's USB driver. In the "rig number" section of the CAT control options there is no IC-7600 listing. I've tried a few other Icom rigs (IC-7800 etc.) but have not succeeded to get the software to talk to the 7600 at all (usually the software freezes). Other software controls the rig via USB CAT just fine using the same comm port settings.
I would like to hear from other 7600 owners who have managed to get WSPR to talk to their rig via the USB driver. Especially, which rig did you select in the "rig number" drop-down?