Spell check doesn't wok Axure 8 , windows 10

I’m using Axure 8 (versions on windows 10.
Spell check disappear from the edit menu on Axure and also F7 doesn’t respond and I don’t see any popup with the spelling mistakes of that the spell check was finished.

Any idea how can I run the spell check or enable it again?

I’m trying to check spelling in english and my computer is also set to en.

Can some one please assist?