Because these files are highly sought after, they are frequently used as "clickbait" by malicious sites.
This specific version (v15) is required to play games released around late 2022. If your emulator is not updated to support v15, the file will not work. Recommendation Download File switch-bios-v15.bin
A legitimate v15 BIOS file should be small (usually a few kilobytes for keys or several megabytes for firmware) and should never require you to "run" an application to install it. Because these files are highly sought after, they