fix version comparison

MediaBrowser.Server.Startup.Common/Migrations/UpdateLevelMigration.cs

@@ -66,29 +66,23 @@ namespace MediaBrowser.Server.Startup.Common.Migrations
             if (releases.Count >= 1)
             {
                 var release = releases[0];
-                Version version;
-                if (Version.TryParse(release.tag_name, out version))
-                {
-                    if (currentVersion > version)
+                var version = ParseVersion(release.tag_name);
+                if (version != null && currentVersion > version)
                 {
                     newUpdateLevel = PackageVersionClass.Beta;
                 }
             }
-            }
 
             // If the current version is later than current beta, set the update level to dev
             if (releases.Count >= 2)
             {
                 var release = releases[1];
-                Version version;
-                if (Version.TryParse(release.tag_name, out version))
-                {
-                    if (currentVersion > version)
+                var version = ParseVersion(release.tag_name);
+                if (version != null && currentVersion > version)
                 {
                     newUpdateLevel = PackageVersionClass.Dev;
                 }
             }
-            }
 
             if (newUpdateLevel != updateLevel)
             {
@@ -96,5 +90,19 @@ namespace MediaBrowser.Server.Startup.Common.Migrations
                 _config.SaveConfiguration();
             }
         }
+
+        private Version ParseVersion(string versionString)
+        {
+            var parts = versionString.Split('.');
+            if (parts.Length == 3)
+            {
+                versionString += ".0";
+            }
+
+            Version version;
+            Version.TryParse(versionString, out version);
+
+            return version;
+        }
     }
 }