Installation of VRidge for HTC Vive Focus is very simple. Open Viveport store inside your headset and find "VRidge".
Install the app, launch it and that's all.
VRidge also supports HTC Vive Focus 3-DOF controller. You can read more about controller support HERE. If you need help setting up RiftCat make sure to check out our tutorial guide HERE or visit our Help Center HERE.
Have fun with VRidge and your HTC Vive Focus!