diff --git a/MidiInAndGuiMonitor.ahk b/MidiInAndGuiMonitor.ahk
index 7c1d02a..4ccb079 100644
--- a/MidiInAndGuiMonitor.ahk
+++ b/MidiInAndGuiMonitor.ahk
@@ -85,7 +85,7 @@ midiMon: ; midi monitor gui with listviews
 gui,14:destroy
 gui,14:default
 gui,14:add,text, x80 y5, Midi Input ; %TheChoice%
-	Gui,14:Add, DropDownList, x40 y20 w140 Choose%TheChoice% vMidiInPort gDoneInChange altsubmit, %MiList%  ; (
+Gui,14:Add, DropDownList, x40 y20 w140 Choose%TheChoice% vMidiInPort gOnMidiMonInputChange altsubmit, %MiList%  ; (
 Gui,14:Add, ListView, x5 r11 w220 Backgroundblack caqua Count10 vIn1,  EventType|StatB|Ch|Byte1|Byte2| 
 gui,14:Add, ListView, x+5 r11 w220 Backgroundblack cyellow Count10 vOut1,  Event|Value| 
 LV_ModifyCol(1, 105)
@@ -94,6 +94,14 @@ gui,14:Show, autosize xcenter y5, MidiMonitor
 
 Return
 
+OnMidiMonInputChange:
+	Gui, Submit, NoHide
+	If %MidiInPort%
+		MidiInDevice := MidiInPort - 1
+	WriteIni()
+	Reload
+Return
+
 ; MIDI Rules dispatcher
 
 MidiRules:
diff --git a/README.md b/README.md
index 49e3b04..bcb0a6c 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Double click on `MidiToMacro.ahk`.
 
 To launch the program when Windows starts, you can add a shortcut to the file in your Start Menu\Startup folder.
 
-The first time you launch the script, you will be prompted to choose a MIDI input device. If you need to change it later, you can right click on the system tray icon and click `MidiSet`. Or, you can open the `MidiMon`, change the input in the "Midi Input" dropdown menu, then reload the script manually.
+The first time you launch the script, you will be prompted to choose a MIDI input device. If you need to change it later, you can right click on the system tray icon and click `MidiSet`. Or, you can open the `MidiMon`, and change the input in the "Midi Input" dropdown menu; the script will automatically reload.
 
 To see a log of recent MIDI input messages and any output events, right click on the system tray icon and click `MidiMon`. You can close this window, and the script will keep running in the background.