I just purchased the Xliff Editor from Apple Store.  I can open the Xliff 1.0 file, but I cannot save it back.

I get the following error message:

" The document “English - Spanish 3.0.xliff” could not be saved."

When I try to duplicate, I get the following error:

“Unsaved Xliff Editor Document.xlf” couldn’t be moved to “Autosave Information” because either the former doesn't exist, or the folder containing the latter doesn't exist."

I have to force quit to get out.
Can anyone help me, please?  I am new to Xliff Editor.

Anil