We sincerely apologize that some players using 2K resolution experienced unresponsive main menu buttons upon launch. This issue has been fixed in yesterday's update.
However, we regret to inform affected players that deleting configuration save files may still be required to resolve this problem completely.
Solution steps:
Navigate to: C:\\Users\\Administrator(your username)\\AppData\\Local\\project_A
Delete all files in this folder
Relaunch the game