Refactor code structure for improved readability and maintainability

package.json

@@ -1,6 +1,6 @@
 {
   "name": "time4midi",
-  "version": "0.3.0",
+  "version": "0.3.3",
   "description": "Cross-platform timeline editor for MIDI notes and Art-Net values, slaved to incoming timecode.",
   "main": "main.js",
   "author": "J.H. Artworks",
@@ -26,7 +26,7 @@
       "main.js",
       "preload.js",
       "src/**/*",
-      "JHArtworks2023_wh.png",
+      "time4midi.png",
       "package.json"
     ],
     "directories": {
@@ -34,6 +34,7 @@
     },
     "npmRebuild": false,
     "win": {
+      "icon": "time4midi.ico",
       "signAndEditExecutable": false,
       "target": [
         {