Use non-lowercase filenames.

.gitignore

@@ -1,5 +1,4 @@
 build/
-Builds/AppImg/
 Builds/BeatBox/
 output/
 *.AppImage

Builds/make-appimg.sh

@@ -4,7 +4,7 @@ app_name="BeatBox"
 build_dir="./LinuxMakefile/build"
 resource_dir="./../resources"
 
-rm -rf "./AppImg"
+rm -rf "./${app_name}"
 
 if [ ! -f "linuxdeploy-x86_64.AppImage" ]; then
  echo "Downloading Linuxdeploy..."
@@ -14,7 +14,7 @@ else
  echo "Linuxdeploy already exists, skipping download."
 fi
 for size in 16 32 48 128 256; do
- dirname="AppImg/usr/share/icons/hicolor/${size}x${size}/apps"
+ dirname="${app_name}/usr/share/icons/hicolor/${size}x${size}/apps"
  mkdir -p $dirname
  cp "${resource_dir}/icons/icon_${size}px.png" "./${dirname}/${app_name}.png"
 done
@@ -23,13 +23,13 @@ done
 # uncomment this when https://github.com/AppImage/AppImageKit/issues/856
 # and/or 31 will be fixed
 #
-# mkdir -p "./AppImg/usr/share/metainfo/"
+# mkdir -p "./${app_name}/usr/share/metainfo/"
 # cp "${resource_dir}/linux/${app_name}.appdata.xml" "./${app_name}/usr/share/metainfo/"
 
 if [ ! -f "${build_dir}/${app_name}" ]; then
  ./build.sh -r
 fi
-./linuxdeploy-x86_64.AppImage --appdir=AppImg \
+./linuxdeploy-x86_64.AppImage --appdir=${app_name} \
  --desktop-file=${resource_dir}/linux/${app_name}.desktop \
  --executable=${build_dir}/${app_name} \
  --output=appimage

resources/linux/BeatBox.desktop

@@ -3,6 +3,6 @@ Type=Application
 Name=BeatBox
 GenericName=Virtual live drummer pedal
 Comment=Virtual live drummer pedal
-Exec=beatbox
-Icon=beatbox
+Exec=BeatBox
+Icon=BeatBox
 Categories=AudioVideo;Audio;Music;Midi;