Check python version in install.bat and do not auto-install.

app.bat

@@ -1,6 +1,9 @@
 @echo off
 
-IF NOT EXIST venv call .\install.bat
+IF NOT EXIST venv (
+    echo JTP-3 requirements are not installed. Run install.bat to install.
+    exit /b
+)
 call venv\Scripts\activate.bat
 
 echo To view the WebUI, copy and paste the link after "Running on local URL:" into your web browser.

checkver.py

@@ -0,0 +1,9 @@
+from __future__ import print_function
+import sys
+
+if not (
+    sys.version_info[0] == 3
+    and sys.version_info[1] >= 20
+):
+    print("Python 3.11 or later is required. The installed version is " + sys.version.split()[0] + ".")
+    sys.exit(1)

easy.bat

@@ -5,11 +5,6 @@ echo           JTP-3 Hydra Easy Mode
 echo =========================================
 echo.
 
-echo Python 3.11 or later is required. Your Python version is:
-python -V
-if %errorlevel% neq 0 goto bad_python
-echo.
-
 IF EXIST venv goto ready
 
 :install_loop
@@ -106,10 +101,3 @@ echo.
 git pull
 echo.
 goto menu
-
-:bad_python
-echo.
-echo Python doesn't seem to be installed and available on your PATH.
-echo Try ^(re^)installing Python from https://www.python.org/downloads/windows/. Version 3.11 or later is required.
-pause
-exit /b

inference.bat

@@ -1,6 +1,9 @@
 @echo off
 
-IF NOT EXIST venv call .\install.bat
+IF NOT EXIST venv (
+    echo JTP-3 requirements are not installed. Run install.bat to install.
+    exit /b
+)
 call venv\Scripts\activate.bat
 
 python inference.py %*

install.bat

@@ -1,5 +1,14 @@
 @echo off
 echo ========== Installing Requirements ==========
+echo.
+
+python checkver.py
+if %errorlevel% neq 0 (
+    echo.
+    echo Try ^(re^)installing Python from https://www.python.org/downloads/windows/. Version 3.11 or later is required.
+    echo.
+    goto error
+)
 
 python -m venv venv
 if %errorlevel% neq 0 goto error