Stop Notepad++ warning if file has been modified from outside

notepad

How can I stop the warning that appears in Notepad++ if the file is modified from an external program or application?

Settings -> Preferences -> MISC. tab

In the section that says File Status Auto Detection make sure that Enable is unchecked

You can disable the confirmation in the settings:

Settings -> Preferences -> MISC. -> Update silently

TextFX allows you to do this manually and you can assign a keyboard shortcut for it as well. See the answers to this question for details.

Plugin Central has a couple of plugins you could try for automatic date/time insertion:

Insertion Version 2.1 (ANSI) by Don HO: Insertion of current file name and date & time. Auto-close the html/xml tag.
Log plugin Version 1.0 (Unicode) by Nicholas Heckman: Log plugin allows Notepad++ has [sic] one of MS Notepad basic features : Append the date/time at the end of file after a file is opened in Notepad++, if file begins with ".LOG".