At its core, wiimotenew.ini is a plain-text configuration file used by the Dolphin Emulator (versions 5.0 and above). It stores the for Wii Remotes. The "new" in its name historically distinguishes it from legacy Wiimote configurations from Dolphin's 4.0 and earlier releases, but today, it is the standard.
Once you have crafted the ideal wiimotenew.ini , preserve it: wiimotenew.ini