How is Duplicate Element Remover going to help you?
Duplicate Element Remover will:
Give you exact control over which design files get processed. (Any set of design files — for example, *.dgn — can be processed with a single command.)
Show you exactly which elements were duplicated so you can pinpoint the source of your duplicate elements.
Prevent duplicate elements from throwing off your automated quantity calculations.
Remove delays (in plotting, view updates and element selection) caused by duplicate elements.