Downgrade Firmware

If you have a problem with a particular firmware, or if the firmware version is displaying as 0.0.0, we have provided the ability to downgrade and rollback the Zen firmware to a previous version.

Downgrade Zen Firmware

This is recommended if the firmware version you last updated to has broken something and is a valuable tool for crushing bugs.

Before you begin, first perform a hard reset then unplug everything from the Cronus Zen and close any other Cronus software.

1. Download the latest version of the Collective Minds Firmware Update Tool and run.

2. Connect the short 12" micro-USB cable from Zen's rear CONSOLE USB port to your Windows PC (or a Mac running Windows). Most onboard USB ports, found at the rear of a PC, carry more power (mA) than the USB headers on the front, so we highly recommend that you connect your Zen directly to onboard USB ports, especially if you are using Mouse & Keyboard (not applicable to Laptops/Notebooks).

If your Cronus is not detected at this point it can only be one of these issues:

  1. Bad micro-USB cable (even new cables can be faulty, try another)

  2. Bad USB Port (not enough power or bad drivers)

  3. You are using Windows 7 and didn't install the driver patch from our Downloads page

  4. Other Cronus software is open - they must be closed (Cronus Pro, Zen Studio etc)

  5. A corrupt USB driver (remove using Windows Device Manager)

  6. Firmware version is displayed as 0.0.0 (you must Downgrade the Firmware)

  7. Your Zen is faulty (extremely rare as they are programmed & tested this way)

3. Press and hold the reset button on the bottom of the Zen.

4. The Zen OLED Message Screen will display 'Zen Bootloader', and the RGB LEDs will glow.

5. The Collective Minds Update tool will now display your Zen's info.

6. Click Continue then slide the "User the Latest Version Available" toggle to the left to view all the available firmware versions. Select the firmware you wish to downgrade to, click Continue then Click Begin Update to begin programming.

7. Access should be restored to your Cronus Zen. You can now update the firmware and perform a factory reset (Zen Studio 👉 Device 👉 Factory Reset).

🔎 Find more detailed information about updating the Cronus Zen firmware 👉 here:

In the unlikelihood that your Cronus Zen will still not recover even after following the all the troubleshooting instructions, then there is a good chance it has developed a hardware fault and you need to return it to your point of purchase to get it replaced under its warranty.