Mineimation

This may sound stupid, but I don't even know how to open Modelbench. When I open the file and click "Modelbench.exe", it opens up and "Open" dialog showing me files. What should I open? If it's for opening and editing models, then where should I get the models or something? Please help, thanks.

Is it possible to make it so that you can import words from Bedrock edition? (Windows 10 edition) Thanks