I'm always curious about the tech choices in desktop applications that say they're fast, so I downloaded this one and was a bit surprised to find that it's an E

I'm always curious about the tech choices in desktop applications that say they're fast, so I downloaded this one and was a bit surprised to find that it's an Electron app. I'm not here to criticize that, though. Instead, I'm curious about what Electron build toolchain the developers are using. Maybe my knowledge of Electron build tools is a bit behind, but this is the first time I've seen an Electron app where, in the Windows version at least, both the x64 and ARM64 versions are packaged in the same installer (inevitably doubling the download size), and the installation is done using NSIS. It looks like there's some kind of updater, but it's not Squirrel. So I'm just curious about whether an open-source tool was used to put all of this together.