The program is working in a non-English language which I don't understand. How can I change it to English?
Unfortunately, from what it seems, the software is available only in Japanese. There is no option to change the language to English. As an alternative, I suggest you to use ArcSoft WebCam Companion, Debut Video Capture Software, Dorgem, SmartCam, or CyberLink YouCam. All of them are easy to use and have an English interface.