Zend certified PHP/Magento developer

How to KEEP empty line after removing duplicates in Notepad++

I am trying to remove duplicates by using Notepad++, but in previous versions there was a default way to do that and leave empty lines. Now it isn’t helping, or I am missing something.

The whole idea is the following – when I have 1000 lines with duplicated text/links with code, I will select “Remove Duplicate Lines” option and I if all of my lines was duplicated I will see 500 lines. But I want to see 1000 rows and play with empty lines/rows.

In example I have identical lines of code like this:

href a 
href a 
href a 
href b 
href b

I want to achieve this:

href a 
empty line 
empty line 
empty line 
href b 
empty line

And using search and replace isn’t an option because there are 3k+ lines when unique lines are around 1k What I am missing here?

Empty lines are needed for me because I will manipulate with it after pasting to the csv file.