Link near Bottom of page. He also has a new Firmware for the p4k that greatly reduces ghosting but introduces some motion blur(haven’t tested). This was released a couple of months ago.
I am personally using Nolo with the 4k.
I am using PiTools 1.0.1.262, but all Versions should do it.
The Trick is to install PiTools first, then uninstall all Nolo driver related stuff (Close Pimax stuff and Steam for this) (also delete the Device Drivers in the Device Manager when connecting them). After everything related in uninstalled, you can just download NoloHome in Steam, it should install the fresh Nolo Drivers right away. Now, always start NoloHome(or SteamVR) after you have startet Pitool, it should work this way.
If your Devices are still not shown in OpenVR, check the VR Driver CMD Tool from the SteamVR Folder to verify that the Nolo SteamVR Drivers are correctly registered.
If you turn on the base station, it should power its Motors, you should be able to feel the shaking in your Hand. If this dosent happen, the IR Markers wont power on. Make sure your Base Station is connected to an good Power Source (2A), even doe it runs on Batterys, its worth a try. Also check that all your Nolo Components use a Firmware Version that works with each other. This Collection of Tools and Knowledge may can help you > GitHub - DJPlaya/Tesseract-Cobra: Tools and Information on how to flash Nolo VR Hardware manually
If you still run into Problems, you may should contact the Nolo Support, they are great, they even replaced half my Nolo Gear over the Years for free