To build latest version from source:

1. Download and install Node.js
2. Download GiveawayJoiner sources
3. Open Terminal program (Windows users: cmd.exe 'as administrator') in sources folder and run this commands:

npm install electron
npm update
npm install -g electron-builder
electron-builder --dir

GiveawayJoiner build will be in sources subfolder 'dist' p.s. for Linux: GiveawayJoiner need 'libgconf-2-4' lib to be installed in your distro, for Ubuntu users in terminal enter command:

sudo apt-get install gconf2