diff --git a/install.ps1 b/install.ps1
index 6ad5678a..dc685b85 100644
--- a/install.ps1
+++ b/install.ps1
@@ -8,7 +8,7 @@ param(
 
 $ErrorActionPreference = "Stop"
 $defaultInstallUrl = "https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
-$defaultInstallSha256 = "f2a35f8df5956bb8b7ff1d697c0c204688d911a8942477b6d084882a92349a3b"
+$defaultInstallSha256 = "974ecc9fd5fc23433ebd50488629abc20aa861a21389cf31044643ddd6e62418"
 $maximumInstallerBytes = 2MB
 $installerExit = 0
 $installer = if ($PSScriptRoot) { Join-Path $PSScriptRoot "install.py" } else { $null }
diff --git a/install.py b/install.py
index be342a2c..5b424eba 100644
--- a/install.py
+++ b/install.py
@@ -2599,6 +2599,9 @@ def _prompt_manual_platform(os_type: str) -> list[tuple[str, Path]]:
             plat = AVAILABLE_PLATFORMS[int(choice) - 1]
         elif choice in AVAILABLE_PLATFORMS:
             plat = choice
+        else:
+            print(f"  Type a number from 1 to {len(AVAILABLE_PLATFORMS)}, a platform name, "
+                  "or q to quit.")
     default_dest = _default_dest(os_type, plat)
     try:
         raw = input(f"BIOS directory [{default_dest}]: ").strip()
@@ -2652,26 +2655,24 @@ def _prompt_platform_choice(
     print("\nInstall for:")
     for i, (name, path) in enumerate(platforms, 1):
         print(f"  {i}) {name.capitalize()} ({path})")
+    last = len(platforms) + (1 if len(platforms) > 1 else 0)
     if len(platforms) > 1:
-        print(f"  {len(platforms) + 1}) All")
+        print(f"  {last}) All")
+    print("  q) quit")
     print()
 
     while True:
-        try:
-            choice = input("> ").strip()
-        except (EOFError, KeyboardInterrupt):
-            print()
+        choice = _ask("> ").lower()
+        if choice == "q":
             sys.exit(0)
-        if not choice:
-            continue
-        try:
-            idx = int(choice)
-        except ValueError:
-            continue
+        idx = int(choice) if choice.isdigit() else 0
         if 1 <= idx <= len(platforms):
             return [platforms[idx - 1]]
-        if idx == len(platforms) + 1 and len(platforms) > 1:
+        if idx == last and len(platforms) > 1:
             return platforms
+        # A wrong answer used to bring back a bare prompt, and nothing said
+        # how to leave it.
+        print(f"  Type a number from 1 to {last}, or q to quit.")
 
 
 def _ask(prompt: str) -> str:
@@ -2741,6 +2742,8 @@ def _prompt_custom_selection(
             return INSTALLED_ONLY
         if answer == "c":
             break
+        keys = "Enter, i, c or q" if installed is not None else "Enter, c or q"
+        print(f"  Type {keys}.")
 
     choices = available_choices(files, omitted)
     if OTHER_SYSTEMS in choices["systems"]:
diff --git a/install.sh b/install.sh
index f4be7c18..5441786c 100755
--- a/install.sh
+++ b/install.sh
@@ -18,7 +18,7 @@ esac
 TEMP_INSTALLER=""
 TEMP_DIRECTORY=""
 DEFAULT_INSTALL_URL="https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
-DEFAULT_INSTALL_SHA256="f2a35f8df5956bb8b7ff1d697c0c204688d911a8942477b6d084882a92349a3b"
+DEFAULT_INSTALL_SHA256="974ecc9fd5fc23433ebd50488629abc20aa861a21389cf31044643ddd6e62418"
 MAX_INSTALLER_BYTES=2097152
 
 cleanup() {
diff --git a/tests/test_install.py b/tests/test_install.py
index 101295d8..35e3cf10 100644
--- a/tests/test_install.py
+++ b/tests/test_install.py
@@ -1514,6 +1514,39 @@ class TestDestinationFollowsUserLinks(unittest.TestCase):
             install._destination_path(bios, "/etc/passwd")
 
 
+class TestDetectedPlatformPrompt(unittest.TestCase):
+    """With two platforms detected the menu had no quit entry, and q or any
+    wrong answer brought back a bare prompt."""
+
+    PLATFORMS = [("emudeck", Path("/e")), ("retroarch", Path("/r"))]
+
+    def _answer(self, *answers: str):
+        replies = iter(answers)
+        out = io.StringIO()
+        with unittest.mock.patch("builtins.input", lambda _prompt="": next(replies)), \
+                contextlib.redirect_stdout(out):
+            try:
+                result = install._prompt_platform_choice(self.PLATFORMS)
+            except SystemExit as exc:
+                result = exc
+        return result, out.getvalue()
+
+    def test_q_quits_and_the_menu_says_so(self):
+        result, out = self._answer("q")
+        self.assertIsInstance(result, SystemExit)
+        self.assertEqual(result.code, 0)
+        self.assertIn("q) quit", out)
+
+    def test_a_wrong_answer_names_the_choices(self):
+        result, out = self._answer("x", "2")
+        self.assertEqual(result, [self.PLATFORMS[1]])
+        self.assertIn("Type a number from 1 to 3, or q to quit.", out)
+
+    def test_all_installs_every_platform(self):
+        result, _ = self._answer("3")
+        self.assertEqual(result, self.PLATFORMS)
+
+
 class TestManualPlatformPrompt(unittest.TestCase):
     """With nothing detected, an interactive run asks instead of exiting."""
 
@@ -1543,6 +1576,14 @@ class TestManualPlatformPrompt(unittest.TestCase):
                 install._prompt_manual_platform("linux")
         self.assertEqual(raised.exception.code, 0)
 
+    def test_a_wrong_answer_says_what_to_type(self):
+        answers = iter(["99", "1", ""])
+        out = io.StringIO()
+        with unittest.mock.patch("builtins.input", lambda _prompt="": next(answers)), \
+                contextlib.redirect_stdout(out):
+            install._prompt_manual_platform("linux")
+        self.assertIn("or q to quit", out.getvalue())
+
     def test_windows_hint_shows_the_one_liner_with_arguments(self):
         hint = "\n".join(install._manual_usage_hint("windows"))
         self.assertIn("--platform retroarch --dest", hint)