1) Download your plugins
Example : Xmltools
2) Extract files
3) Copy XMLTools.dll to C:\Program Files (x86)\Notepad++\plugins
4)Copy files ( iconv.dll , zlib1.dll , libxml2.dll .. ) in the ext_libs folder to C:\Program Files (x86)\Notepad++
WARNING : Copy files in the ext_libs folder to NOTEPAD++ ROOT
Example : Xmltools
2) Extract files
3) Copy XMLTools.dll to C:\Program Files (x86)\Notepad++\plugins
4)Copy files ( iconv.dll , zlib1.dll , libxml2.dll .. ) in the ext_libs folder to C:\Program Files (x86)\Notepad++
WARNING : Copy files in the ext_libs folder to NOTEPAD++ ROOT