Merge pull request #38 from OpenTabletDriver/upgrade-note-windows

Add Windows install upgrade note

Author: InfinityGhost

OpenTabletDriver.Web/Views/Wiki/Install/Windows.cshtml

@@ -18,12 +18,24 @@
     </li>
 </ol>
 
+<p class="text-muted">
+    If you were previously using the standalone installer/updater (before v0.6), it is highly suggested that you switch
+    to the new method for installing OpenTabletDriver below.
+</p>
+
 <hr/>
 
-<h3 class="wiki-nav-item" id="portable">
-    Portable
+<h3 class="wiki-nav-item" id="installation">
+    Installation
 </h3>
 <div class="ms-3">
+    <p>
+        <small class="text-muted">
+            Note: If you are upgrading from an older version of OpenTabletDriver, it is important that you do not
+            install it on top of the old version and instead clean up the old directory or install it to its own
+            directory.
+        </small>
+    </p>
     <ol>
         <li>
             Download the