If you can't find a working link, reply with where you bought the HD2018 card, and I can suggest a more specific source.
If you are looking for the HD2018 LED software free download, this guide covers everything from installation to basic setup. Getting Started with HD2018 LED Software Hd2018 Led Software Free Download
Export: Insert a USB drive into your PC, click the "U-Disk" button in the software, and save the data. Plug the USB into your LED sign to update the content. Common Troubleshooting Tips If you can't find a working link, reply
: Provides tools for debugging, firmware upgrades, and screen testing (grayscale, color lump, mesh, and spot tests). LedInCloud Compatibility & Requirements Supported Controllers : Compatible with Huidu series including (e.g., HD-E62), (e.g., HD-W60), System Requirements : Requires a Windows PC to run the application. Language Support Plug the USB into your LED sign to update the content
OE (Output Enable) polarity is reversed. Solution: In Screen Parameters , invert the OE polarity (check/uncheck OE Negative ).