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删除设备(手机或平板)主屏幕上的旧版点餐软件
用数据线将手机或平板设备与主机电脑连接
设备上弹窗提示USB的用途，选择 “传输文件(MTP)”
打开主机电脑上 “我的电脑 (Questo PC)”
打开并进入设备文件夹 “Download”
删除 “Download” 文件夹内的旧版apk点餐软件
将新的APK安装包放入 “Download” 文件夹内
打开手机或平板设备内的 “文件管理”
找到APK安装包，点击下载安装
安装成功后，返回桌面运行
