[ubuntu-za] evolution - remove duplicates

[terry logie]

Hi there, I downloaded "remove duplicates" tar.gz file (I'm trying to
sort out 7 yrs of .pst files from various versions of Outlook).

I installed the tar.gz with Kompile, but the plug-in doesn't work.
I highlight the email in question then right-click, select remove
duplicates, and nothing happens.
Maybe I installed it incorrectly?
I made the move to Ubuntu in August last year, and have had fun
learning, even at the age of 59!!
Grateful for pointers.
Terry Logie