the process cannot access the file fiddlerjsonviewer.dll because it is being used by another process willow 安装失败
前提：明明安装了fiddler4,却提醒还是找不到fidder，首先把他们放在都放在C盘，因为看见错误报告提示要在c:\下面，然后，重要的是，
https://github.com/QzoneTouch/commonWidget/releases
要下载这里的willow.才能安装
