Finding the exact version 21.09 may require contacting the manufacturer directly if it is not available on the official download page. However, the steps and resources provided here should enable you to download, install, and configure a compatible version of the HCLED software for your display.
While "HCLED 21.09" may not be readily available for direct download, the software is usually tied to a specific hardware purchase. By following the steps outlined above, you can locate, install, and troubleshoot the software to get your LED display functioning again. If you continue to face issues, your best bet is to contact the original vendor or consider using generic LED control software as a fallback option. hcled 21.09 led software download