diff --git a/_msbuild.py b/_msbuild.py
index 96e2e77..b8cf388 100644
--- a/_msbuild.py
+++ b/_msbuild.py
@@ -228,17 +228,24 @@ def get_commands():
 
 
 def _make_xyzw_version(v, sep="."):
+    """Calculate a suitable x.y.z.w version from our user-friendly version.
+
+    For MSIX in the Microsoft Store, the fourth field must be 0.
+
+    For MSI, the first field must be <256.
+
+    If the explicit version contains a non-zero field 3, it will override the
+    one that is calculated from prerelease markers.
+    """
     from packaging.version import parse
     v = parse(v)
-    if not v.pre:
-        return "{0}{4}{1}{4}{2}{4}{3}".format(v.major, v.minor, v.micro, 0xF0, sep)
-    return "{0}{4}{1}{4}{2}{4}{3}".format(
-        v.major,
-        v.minor,
-        v.micro,
-        {"a": 0xA0, "b": 0xB0, "rc": 0xC0}.get(v.pre[0].lower(), 0) | v.pre[1],
-        sep,
-    )
+    micro = 0xF0
+    if v.pre:
+        micro = {"a": 0xA0, "b": 0xB0, "rc": 0xC0}.get(v.pre[0].lower(), 0) | v.pre[1]
+    if v.micro:
+        print("[WARNING]Overriding calculated version field 3 with", v)
+        micro = v.micro
+    return sep.join(map(str, (v.major, v.minor, micro, 0)))
 
 
 def _patch_appx_identity(source, dest, **new):
diff --git a/src/pymanager/appxmanifest.xml b/src/pymanager/appxmanifest.xml
index 29e7baa..f97b236 100644
--- a/src/pymanager/appxmanifest.xml
+++ b/src/pymanager/appxmanifest.xml
@@ -49,18 +49,6 @@
                                 Square44x44Logo="_resources/setupx44.png"
                                 BackgroundColor="transparent" />
         </Application>
-        <Application Id="Pyw.Manager.Exe"
-                     Executable="pyw-manager.exe"
-                     EntryPoint="Windows.FullTrustApplication"
-                     desktop4:SupportsMultipleInstances="true"
-                     desktop4:Subsystem="windows">
-            <uap:VisualElements DisplayName="Python install manager (windowed)"
-                                Description="Add, remove and launch Python without creating a console window."
-                                Square150x150Logo="_resources/setupx150.png"
-                                Square44x44Logo="_resources/setupx44.png"
-                                BackgroundColor="transparent"
-                                AppListEntry="none" />
-        </Application>
 
         <Application Id="Pymanager.Exe"
                      Executable="pymanager.exe"