Question about Zoho plug-in

Question about Zoho plug-in

Hi
 
We've started using Zoho docs & using the plug-in to edit our documents in Word.
 
When we try to save the edited document back into Zoho Docs (via the plug in) - the window for "save as" a new file comes up - which means we can't save the edited file in ts original location/ under the original name.
 
This problem has only been happening the last few days. Up until then using the plug-in has been wonderful.
 
Can you provide any suggestions?
 
Many thanks for your time & kind regards.