Unblock your file.

- Locate the blocked file (your chf file)
- Right-click on the file and select Properties from the menu.
- Click Unblock on the General tab.
- Click OK.

[![enter image description here][1]][1]


Source: https://thirtysix.zendesk.com/hc/en-us/articles/202921675-How-to-Unblock-a-File-Downloaded-from-an-Email-or-the-Internet

  [1]: https://i.sstatic.net/kEy8Z.png