Can be, but I think there's more, I mean, when I export, I'll paste the blob into the .txt file with win notepad.
That editor is one of the most simple txt editor that you can get, and it shudn't add anything on it's own, like MS Word does as example.
The importing is a simply highlight the line -> copy -> paste in the import window.
Besides, it was working fine until 3 days ago when I last used that function.