I just started using Note Pad ++ today and I already did something I don't know how to undo. When I make a mistake I cant simply insert character without deleting the character to the right of where I am trying to insert a character. Any suggestions?
You have probably put N++ into "overwrite" mode. Press the "Insert" key on the keyboard (should be above the arrow keys).
You can see which state the program is in by looking in the right bottom corner where it says either "INS" or "OVR".