I had a similar problem and found a solution:
In Windows 10, when you install a font, it will be installed in the user directory (but still show up when you open C:\Windows\Fonts with Windows Explorer!)
With a command prompt, you can copy the .ttf file into c:\windows\fonts but this will not install the font.
Solution:
- download FontReg:
[Link: code.kliu.org]- place the binary into a folder where the font/s you want to install are located
- run: "FontReg.exe /copy"
(the program will NOT output any confirmation messages, pop ups or whatsoever!)
The fonts are now not only copied to c:\windows\fonts but also installed (system wide) and Pronto Edit Professional will not only show it in the editor but also embed it into the configuration file that is copied to the remote. :)