Cross|Up Designer Troubleshooting

Below are instructions on mitigating issues with Saving and Loading data to and from the Cross|Up through the Cross|Up Designer.

Ensure you have the latest firmware: Cross|Up Designer and Firmware.

1. Install the CH340 drivers.

[You do not need the Cross|Up plugged in during this step.]

The Designer download should come with CH340 drivers, located in the folder with the Designer.

Select and open the "CH340 drivers" file.

An admin window should show up and ask if you want to run this program, select "Yes."

Next the Device Driver Install / UnInstall window will show up.
Make sure "CH340[...]" or "CH341[...]" is selected, then press "INSTALL."

If you get a "Device Install Error" that most likely means that you already have the drivers installed.

Once the drivers are installed, restart your computer.

2. Run in Administrator Mode

[You do not need the Cross|Up plugged in during this step.]

To ensure that the antivirus or other programs on your computer are not interfering with the Cross|Up Designer, we recommend using Administrator mode.

2A. Open in Admin Mode

Right click the Cross|Up Designer application, then select "Run as administrator."


A window will show up asking you to run the program. Select "Yes."

2B. Setting Admin Mode as Default

You can also set the Cross|Up Designer - and its components - to run in admin mode every time.

First, open the Cross|Up Designer folder.

These are the files you want to set for admin mode:

  • avrdude
  • avrdude2
  • CrossUpDesigner


Right click one of the files, and select "Properties" (at the bottom of the menu).


Once the "Properties" window is open:

  1. Click on the "Compatibility" tab
  2. Check the "Run as administrator" box
  3. Then select "Apply"

Select "OK" and follow this process with all of these files:

  • avrdude
  • avrdude2
  • CrossUpDesigner


3. Use the USB-B port

When using the Cross|Up designer, only use the USB-B port on the side of the Cross|Up and connect it to the PC.

Do not use the gaming port or have the Cross|Up plugged into anything else.

Use a USB-B to USB-A cable (included with your Cross|Up, but can be found anywhere you can find printers or Ethernet cables).

4. Specify the COM Port

In order to properly save to and load from your Cross|Up, this is the step that is most important to ensure is done correctly.

4A. Determine which COM port your Cross|Up is using in the Windows Device Manager

Use the Windows search bar to find the program, then select "Device Manager."

Once Device Manager is open, select "Ports (COM & LPT)."

Within that there should be a device that says: "USB-SERIAL CH340" or something similar. If you have multiple ports in this section and do not know which one is the Cross|Up: disconnect and reconnect the Cross|Up to see which new port shows up.

The "(COM#)" is the COM port number you will use in the Designer.

[Note: This COM port number can and will change when you unplug and replug the Cross|Up into a different USB port. In general, it is safe to check which COM port your Cross|Up is in case you have multiple devices using COM ports.]


4B. Specify COM port in the Designer

When saving or loading, the Cross|Up Designer will open this window:

Click the "Use A Specific COM Port" box. Once selected, click on the drop-down arrow and you should be able to select from a list of COM ports - choose the COM port that corresponds to your Cross|Up.

4C. Specify COM port in the Firmware Updater

On the Firmware Updater, on the right side of the window click the "Use A Specific COM Port" box. Once clicked, you should be able to select from a list of COM ports - choose the COM port that corresponds to your Cross|Up. (You can also use the "Ignore these COM ports" list to select all the COM ports you do not want to use, just in case.)

5. Change USB ports

Use a different USB port on your PC.

  • Try every single USB port, even the ports on the back of your PC.
  • In general, do not use a USB hub.
  • List of USB ports that will most likely work
    • USB 2.0 ports directly on your motherboard.
    • USB 2.0 hubs connected to USB 3.0 port or USB-C port
    • Powered USB 2.0 hubs
  • List of USB ports that will most likely not work
    • USB 1.1 ports
    • USB Hubs connected through a USB 2.0 port
    • USB 2.0 ports that cannot provide a high enough voltage (ports on your PC case, hubs, KVMs)
    • Certain USB 3.0/3.1/3.1Gen2 ports
    • USB-C port adapters

If you continue to have issues, please post in the #tech-support channel of our Discord or email us at with a specific description of your issue.