Instead of having to install the Arduino IDE, downloading all the correct libraries, uncommenting #defines in the .ino file, and editing the User_Setup.h from the TFT_eSPI library, there is now an easier and more error-proof method of uploading the FreeTouchDeck code. It is called the "FreeTouchDeck Web Installer". Simply go to https://install.freetouchdeck.com and follow the instructions on the screen.

The Web Installer is powered by ESP Web Tools by ESPHome, huge thanks to those people!