Is there a way to overwrite existing target terms with updated versions client sent in an Excel file?

Dear colleagues,

Here is a question from my colleague who uses a different CAT tool but found out his CAT does not have such a capability.  So I said I would ask here since I am interested in knowing whether this can be done with Studio/Multiterm/Studio apps.

My colleague has a huge termbase that can be exported to cvs/Excel file.  He received an updated bilingual list from his client who asks him to update the termbase with the corrected target terms.  Since the scope is quite extensive, he can't do it manually.  He tried to import these updated terms to the existing termbase, but they were only added to the termbase, not replacing/overwriting the existing terms.  

Is there a way to do this using any of the Studio products including the apps? If there is and it does not take too much manual work, can you share the how-to steps with me?

Thank you in advance for your suggestions.

 

Chunyi