Opening and Saving files:

Opening goes very similar to any other windows application.

Saving a file can be done in multiple ways.

You can Reload a file if you wish to update the current view of the file (for example, if the file has been modified) or restore its contents to what is on disk if you have modified the file but not yet saved. If the file has been changed on disk, by default Notepad++ will ask you if you wish to reload it (see Preferences for more details).

You can do so by selecting File->Reload from Disk.

Finally, you can choose to Rename a file by selecting File->Rename. A dialog will pop up asking you for the new name of the file, similar to the Save As dialog. However, the original file will be deleted.