I based it on the Linux version, but a quick search yielded https://github.com/nanami5270/GARbro-Mod which seems to work for the Windows version.
No problem. For reference, it's not Electron that combines all the assets into a single file, it's Enigma Virtual Box. By default, Electron does no bundling of assets. This game uses both Electron and Enigma Virtual Box (On Windows).