diff --git a/BaseFiles/Common/Common.csproj b/BaseFiles/Common/Common.csproj
index 6a5fcadab..b020b1b02 100644
--- a/BaseFiles/Common/Common.csproj
+++ b/BaseFiles/Common/Common.csproj
@@ -36,6 +36,9 @@
     <Content Include="LICENSE_GPLV3.TXT">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="postinstall.lock">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
     <Content Include="README.TXT">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
diff --git a/BaseFiles/Common/html/ui/core/popup.cronwizard.js b/BaseFiles/Common/html/ui/core/popup.cronwizard.js
index db963def4..aeaa3c8dd 100644
--- a/BaseFiles/Common/html/ui/core/popup.cronwizard.js
+++ b/BaseFiles/Common/html/ui/core/popup.cronwizard.js
@@ -729,8 +729,8 @@ $$.getMonthCron = function(dateFrom, dateTo, dayOccur, monthOccur) {
         cron = '* * '+(df!=1?'1-':'')+dt+' '+mt+' *';
         cronItems.push(cron);
         if (mf > mt || mt-mf > 1 || (mf == mt && dt < df)) {
-            var mfn = mf<11 ? mf+1 : 0;
-            var mtp = mt>0 ? mt-1 : 11;            
+            var mfn = mf<12 ? mf+1 : 1;
+            var mtp = mt>1 ? mt-1 : 12;            
             cron = '* * * '+mfn+(mfn!=mtp?'-'+mtp:'')+' *';
             cronItems.push(cron);
         }
diff --git a/BaseFiles/Common/postinstall.lock b/BaseFiles/Common/postinstall.lock
new file mode 100644
index 000000000..e69de29bb
diff --git a/HomeGenie.Tests/SchedulerServiceTest.cs b/HomeGenie.Tests/SchedulerServiceTest.cs
index a5d068df9..72b7965c4 100644
--- a/HomeGenie.Tests/SchedulerServiceTest.cs
+++ b/HomeGenie.Tests/SchedulerServiceTest.cs
@@ -74,6 +74,16 @@ public void CronExpressionWithExcept(string expression)
             DisplayOccurences(expression, occurences);
             Assert.That(occurences.Count, Is.EqualTo(12));
         }
+        
+        [Test]
+        [TestCase("[ (* * 1-31 11 *) : (* * 1-15 1 *) : (* * * 12 *) ]")]
+        public void CronExpressionAcrossYears(string expression)
+        {
+            var occurences = _scheduler.GetScheduling(new DateTime(2018, 6, 1), new DateTime(2019, 6, 30), expression);
+
+            DisplayOccurences(expression, occurences);
+            Assert.That(occurences.Count, Is.EqualTo((30+31+15)*1440));
+        }
 
         private static List<DateTime> GetOccurencesForDate(SchedulerService scheduler, DateTime date, string expression)
         {
@@ -90,4 +100,4 @@ private void DisplayOccurences(string cronExpression, List<DateTime> occurences)
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/HomeGenie/Program.cs b/HomeGenie/Program.cs
index 52d09f98b..78e500129 100644
--- a/HomeGenie/Program.cs
+++ b/HomeGenie/Program.cs
@@ -42,36 +42,53 @@ static void Main(string[] args)
 
             Console.CancelKeyPress += new ConsoleCancelEventHandler(Console_CancelKeyPress);
 
-            // Move MIG libraries from root folder to lib/mig
-            // TODO: find a better solution to this
-            string[] migFiles =
-            {
-                "MIG.HomeAutomation.dll",
-                "MIG.Protocols.dll",
-                "LibUsb.Common.dll",
-                "LibUsbDotNet.LibUsbDotNet.dll",
-                "XTenLib.dll",
-                "ZWaveLib.dll"
-            };
-            foreach (var f in migFiles)
+            PostInstallCheck();
+            
+            _homegenie = new HomeGenieService();
+            do { System.Threading.Thread.Sleep(2000); } while (_isrunning);
+        }
+
+        private static void PostInstallCheck()
+        {
+            string postInstallLock = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "postinstall.lock");
+            if (File.Exists(postInstallLock))
             {
-                string source = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, f);
-                if (!File.Exists(source)) continue;
+                // Move MIG interface plugins from root folder to lib/mig
+                // TODO: find a better solution to this
+                string[] migFiles =
+                {
+                    "MIG.HomeAutomation.dll",
+                    "MIG.Protocols.dll",
+                    "LibUsb.Common.dll",
+                    "LibUsbDotNet.LibUsbDotNet.dll",
+                    "XTenLib.dll",
+                    "ZWaveLib.dll"
+                };
+                foreach (var f in migFiles)
+                {
+                    string source = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, f);
+                    if (!File.Exists(source)) continue;
+                    try
+                    {
+                        string dest = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "lib", "mig", f);
+                        if (File.Exists(dest)) File.Delete(dest);
+                        File.Move(source, dest);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine("{0}\n{1}\n", e.Message, e.StackTrace);
+                    }
+                }                
+                // TODO: place any other post-install stuff here
                 try
                 {
-                    string dest = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "lib", "mig", f);
-                    if (File.Exists(dest)) File.Delete(dest);
-                    File.Move(source, dest);
+                    File.Delete(postInstallLock);
                 }
                 catch (Exception e)
                 {
-                    Console.WriteLine(e.Message);
-                    Console.WriteLine(e.StackTrace);
+                    Console.WriteLine("{0}\n{1}\n", e.Message, e.StackTrace);
                 }
             }
-            
-            _homegenie = new HomeGenieService();
-            do { System.Threading.Thread.Sleep(2000); } while (_isrunning);
         }
 
         internal static void Quit(bool restartService)