diff --git a/api/launch.bat b/api/launch.bat
index 0d5933e5..680de5d9 100644
--- a/api/launch.bat
+++ b/api/launch.bat
@@ -1,5 +1,7 @@
 call onnx_env\Scripts\Activate.bat
 
+echo "This launch.bat script is deprecated in favor of launch.ps1 and will be removed in a future release."
+
 echo "Downloading and converting models to ONNX format..."
 IF "%ONNX_WEB_EXTRA_MODELS%"=="" (set ONNX_WEB_EXTRA_MODELS=..\models\extras.json)
 python -m onnx_web.convert ^
@@ -10,6 +12,12 @@ python -m onnx_web.convert ^
 --extras=%ONNX_WEB_EXTRA_MODELS% ^
 --token=%HF_TOKEN% %ONNX_WEB_EXTRA_ARGS%
 
+IF NOT EXIST .\gui\index.html (
+  echo "Please make sure you have downloaded the web UI files from https://github.com/ssube/onnx-web/tree/gh-pages"
+  echo "See https://github.com/ssube/onnx-web/blob/main/docs/setup-guide.md#download-the-web-ui-bundle for more information"
+  pause
+)
+
 echo "Launching API server..."
 waitress-serve ^
 --host=0.0.0.0 ^
diff --git a/api/launch.ps1 b/api/launch.ps1
index 19add137..ba898151 100644
--- a/api/launch.ps1
+++ b/api/launch.ps1
@@ -10,6 +10,13 @@ python -m onnx_web.convert `
 --extras=$Env:ONNX_WEB_EXTRA_MODELS `
 --token=$Env:HF_TOKEN $Env:ONNX_WEB_EXTRA_ARGS
 
+if (!(Test-Path -path .\gui\index.html -PathType Leaf)) {
+  echo "Downloading latest web UI files from Github..."
+  Invoke-WebRequest "https://raw.githubusercontent.com/ssube/onnx-web/gh-pages/v0.11.0/index.html" -OutFile .\gui\index.html
+  Invoke-WebRequest "https://raw.githubusercontent.com/ssube/onnx-web/gh-pages/v0.11.0/config.json" -OutFile .\gui\config.json
+  Invoke-WebRequest "https://raw.githubusercontent.com/ssube/onnx-web/gh-pages/v0.11.0/bundle/main.js" -OutFile .\gui\bundle\main.js
+}
+
 echo "Launching API server..."
 waitress-serve `
 --host=0.0.0.0 `