Software & Firmware Downloads
All downloads for the URX Core75. Always use the latest stable firmware unless you have a specific reason to stay on an older version.
Firmware
How to flash
Follow the Software & Firmware Guide for flashing instructions.
v1.1.0 Latest
Released: 05/07/2026
Downloads
| Variant | File | SHA1 |
|---|---|---|
| VIA | urx_core75_default.bin |
605b803a850f317127239b106c2b69e68a135afe |
| VIAL | urx_core75_vial.bin |
eaa0a5cac993f8b17cfb0e1dbf9b3c2f7258214a |
Changelog
- Add SignalRGB Support
- Fix Caps Lock Indicator
- Sync PaletteFX palette
- Initial VIAL Release
VIA JSON
| File | Mode | Notes |
|---|---|---|
URX_Core75_VIA.json |
Wired | Use with a wired USB connection |
URX_Core75_VIA_2.4G.json |
2.4GHz | Use when connected via the 2.4G dongle |
Info
Upload the JSON in VIA by enabling Show Design tab in VIA settings → Design tab → Load the file.
SignalRGB Plugin
| File | Notes |
|---|---|
URX_Core75.js |
Place in %userprofile%\Documents\WhirlwindFX\Plugins |
Info
Requires SignalRGB (Windows only). See the SignalRGB & OpenRGB guide for setup instructions.
QMK Source Code
| Resource | Link |
|---|---|
| QMK Source | github.com/URX-keyboard/qmk_firmware |
To build from source, follow the QMK documentation