getAppExec() {
    let execFolder = this.getAppPath();
    let exec = {
      mac: '',
      win: path.basename(process.execPath),
      linux32: path.basename(process.execPath),
      linux64: path.basename(process.execPath)
    };
    return path.join(execFolder, exec[platform]);
  }
Returns current application executable.

@returns {string}