韩国采购需求：触摸屏显示器，液晶触摸屏，液晶触摸显示面板，液晶屏模块，无线彩色温控器，智能房间温控器

I'm working with a DWIN LCD module using T5L DGUS2 firmware V6.5, and I've run into issues while developing with DGUS Tool V7.x. After compiling my project and placing the DWIN_SET folder on the microSD card, the LCD recognizes the card but fails to load any project files, showing "000 files" across the board. I noticed the DGUSII Development Guide mentions that projects from V7.6 aren't compatible with V6.x firmware, leading me to wonder about the best approach moving forward. Could you clarify if there's an official method for running V7.x projects on V6.5 firmware? Is there a way within DGUS Tool to create compatible output files? If not, I'd appreciate access to the V6.x installer for proper project builds. Additionally, is firmware upgrade from V6.5 to V7.x possible? If yes, please provide the necessary files and instructions for that process. Your insights on this would be invaluable as I navigate these compatibility challenges.