Blitz Search is a simple interface with the external Blitz Search Tool.
Download and install the main Blitz Search from the Project Homepage:
Plugins drop down navigate to the plugins folder
create a folder there named "BlitzSearch"
From the release page here, grab the latest Zip.. Extract the BlitzSearch.dll to your NotePad++ plugin folder
Click this button to run:
By Default the key is bound to F8 but you'll need to work out the conflict in keyboard bindings page.
Settings->Shortcut Mapper->Pluggins Commands
Search This ( with Selction ) searches that word in Blitz Search
Search This ( with caret on a word and No Selection ) searches whole word in Blitz Search