Thank you for your post.
Our Testing and Development departments are aware of a hyphen/dash character being replaced with a "checkbox" character under Windows 10 after applying the Threshold 2 update. I have attached your post to the original report. When more information becomes available, I will post again.
Todays Windows update (KB3124200) solved the problem for us.
Windows 10 Enterprise 64bit German
FileMaker Pro Advanced 14.0.4
Yep. The Windows update fixed it. All good now.