diff --git a/Misc/NEWS.d/next/Windows/2019-08-06-09-35-12.bpo-37734.EoJ9Nh.rst b/Misc/NEWS.d/next/Windows/2019-08-06-09-35-12.bpo-37734.EoJ9Nh.rst
new file mode 100644
index 0000000..51feecb
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2019-08-06-09-35-12.bpo-37734.EoJ9Nh.rst
@@ -0,0 +1 @@
+Fix use of registry values to launch Python from Microsoft Store app.
diff --git a/PC/layout/main.py b/PC/layout/main.py
index fe934bf..07b7e6d 100644
--- a/PC/layout/main.py
+++ b/PC/layout/main.py
@@ -153,9 +153,15 @@
                 yield "libs/" + n + ".lib", lib
 
     if ns.include_appxmanifest:
+        yield from in_build("python_uwp.exe", new_name="python{}".format(VER_DOT))
+        yield from in_build("pythonw_uwp.exe", new_name="pythonw{}".format(VER_DOT))
+        # For backwards compatibility, but we don't reference these ourselves.
         yield from in_build("python_uwp.exe", new_name="python")
         yield from in_build("pythonw_uwp.exe", new_name="pythonw")
     else:
+        yield from in_build("python.exe", new_name="python{}".format(VER_DOT))
+        yield from in_build("pythonw.exe", new_name="pythonw{}".format(VER_DOT))
+        # For backwards compatibility, but we don't reference these ourselves.
         yield from in_build("python.exe", new_name="python")
         yield from in_build("pythonw.exe", new_name="pythonw")
 
@@ -163,9 +169,9 @@
 
     if ns.include_launchers and ns.include_appxmanifest:
         if ns.include_pip:
-            yield from in_build("python_uwp.exe", new_name="pip")
+            yield from in_build("python_uwp.exe", new_name="pip{}".format(VER_DOT))
         if ns.include_idle:
-            yield from in_build("pythonw_uwp.exe", new_name="idle")
+            yield from in_build("pythonw_uwp.exe", new_name="idle{}".format(VER_DOT))
 
     if ns.include_stable:
         yield from in_build(PYTHON_STABLE_DLL_NAME)
diff --git a/PC/layout/support/appxmanifest.py b/PC/layout/support/appxmanifest.py
index 58fba84..0a0f1fc 100644
--- a/PC/layout/support/appxmanifest.py
+++ b/PC/layout/support/appxmanifest.py
@@ -154,9 +154,9 @@
             "SysVersion": VER_DOT,
             "Version": "{}.{}.{}".format(VER_MAJOR, VER_MINOR, VER_MICRO),
             "InstallPath": {
-                "": "[{AppVPackageRoot}]",
-                "ExecutablePath": "[{AppVPackageRoot}]\\python.exe",
-                "WindowedExecutablePath": "[{AppVPackageRoot}]\\pythonw.exe",
+                "": "[{{AppVPackageRoot}}]",
+                "ExecutablePath": "[{{AppVPackageRoot}}]\\python{}.exe".format(VER_DOT),
+                "WindowedExecutablePath": "[{{AppVPackageRoot}}]\\pythonw{}.exe".format(VER_DOT),
             },
             "Help": {
                 "Main Python Documentation": {
@@ -395,7 +395,7 @@
         ns,
         xml,
         "Python",
-        "python",
+        "python{}".format(VER_DOT),
         ["python", "python{}".format(VER_MAJOR), "python{}".format(VER_DOT)],
         PYTHON_VE_DATA,
         "console",
@@ -406,7 +406,7 @@
         ns,
         xml,
         "PythonW",
-        "pythonw",
+        "pythonw{}".format(VER_DOT),
         ["pythonw", "pythonw{}".format(VER_MAJOR), "pythonw{}".format(VER_DOT)],
         PYTHONW_VE_DATA,
         "windows",
@@ -418,7 +418,7 @@
             ns,
             xml,
             "Pip",
-            "pip",
+            "pip{}".format(VER_DOT),
             ["pip", "pip{}".format(VER_MAJOR), "pip{}".format(VER_DOT)],
             PIP_VE_DATA,
             "console",
@@ -430,7 +430,7 @@
             ns,
             xml,
             "Idle",
-            "idle",
+            "idle{}".format(VER_DOT),
             ["idle", "idle{}".format(VER_MAJOR), "idle{}".format(VER_DOT)],
             IDLE_VE_DATA,
             "windows",