How can automatically reload modified files in Notepad++? The confirmation step is annoying, and is completely unnecessary in some situations.
There is a nice plugin called Document monitor (Can be found and installed from the Plugins => Plugin Manager => show Plugin Manager menu),
It updates the opened files every 3 seconds. Together with the option to "scroll to last line after update", it will have the ability to "tail" a log file as wanted.
After the plugin installation don't forget to activate it by clicking:
Plugins => Document monitor => start to monitor
For monitoring an individual log file, use the View > Monitoring (tail -f) option (thanks to https://superuser.com/a/1246651/17025).
This will keep the file up to date, and also keep the end of the file visible (which is not always exactly what you want); it also is a setting for each individual file rather than a global setting.