If you receive an error called “(0) Yotogi.Category enum parse error (non-japanese text)”, then that means your computer has not completely changed the system locale to Japanese because AppLocale doesn’t support x64/64-bit OS. You must do the following below (choose one method only).

For the x64/64-bit version without setting Windows system locale to Japanese, you can use NTLEA x64 and configure it like here. Next, press the arrow on the bottom right and that makes it so you can right click COM3D2x64.exe to run the game with NTLEA x64.

Setting Windows system locale to Japanese, follow the intructions below (note: This method is recommended because it’s simple, doesn’t require NTLEA x64 and works fine on Windows 10).
Control Panel > Region > Administrative Tab > Language for non-Unicode programs choose Japanese(Japan) and restart your computer.

Done ^^