[scribus] Spaces between words

[L Macintyre]

I have imported a Word file successfully into a Scribus text frame, but the 
justification disappears on the right hand side. If I restore it through the 
Properties file I am left with large gaps between words in the last lines of 
paragraphs, where there are not sufficient words to achieve double 
justification. The last line may only have eight words in it, yet they are 
stretched across the double justification. How do I correct this? 

My main use of Scribus will be to edit a 20 chapter novel imported from Word. 
Has anyone a list of steps or general guidance to offer me?

Grateful thanks from snowy Scotland.