I'm on a relatively new Windows 7 machine and in Notepad++ the TextFX HTMLTidy doesn't work. It says "Unable to find libTidy.dll in the system path or C:\program files (x86)\Notepad++\plugins\Config\tidy\libTidy.dll". Some links suggest moving the files to that location, but where do I get them from? Argh, why do I always find Notepad++ plugins so frustrating!
I'm using Notepad++ 5.9.3 on Windows 7 x64.
Oh, it looks like it's something annoying with plugins not being included in 5.9.3, but being included in earlier versions. See post here.
The solution is to download the 5.9 ZIP file from here, then copy the plugins\config folder to the Notepad++\plugins folder.