Libre not recognizing windows 8.1 mail tile as default aplication.

So I am currently trying to sent a calc document as PDF via email. Except Libre seems to be unable to recognize windows 8.1 mail tile as default application. Was wondering is there a way to manually point out to Libre that there is one. I tried looking under setting → internet but there seems to be no E-mail settings.

What exactly did you try so far and what are the results of each step you took?

I have tried Simply using the function Export as e-mail, found under file. In an attempt to mail some one something. However it returns no email client found error.