Update README.md

Author: codingseb

README.md

@@ -1,7 +1,8 @@
 # CSharpRegexTools4Npp
 Some tools for using C# Regex for Notepad++ (As Notepad++ Plugin)
 
-Need a Notepad++ installed on the machine.
+Need a [Notepad++](https://notepad-plus-plus.org/) installed on the machine.
+(At least version 7.6.3, older versions can work but need modification of the file [NppPlugin.DllExport.targets](https://github.com/codingseb/CSharpRegexTools4Npp/blob/master/CSharpRegexTools4Npp/PluginInfrastructure/DllExport/NppPlugin.DllExport.targets))
 And the right to write in the plugin directory
 
 ## Credits