fix release note urls, add unity to list even without uninstaller.exe (but missing version info)

Author: unitycoder

UnityLauncher/Form1.cs

@@ -242,6 +242,23 @@ bool ScanUnityInstallations()
                                 }
                             } // have unity.exe
                         } // have uninstaller.exe
+                        else // no uninstaller, probably preview builds
+                        {
+                            var unityExe = Path.Combine(directories[i], "Editor", "Unity.exe");
+                            if (File.Exists(unityExe) == true)
+                            {
+                                // get full version number from uninstaller
+                                var unityVersion = Tools.GetFileVersionData(unityExe).Replace("Unity", "").Trim();
+                                if (unityList.ContainsKey(unityVersion) == false)
+                                {
+                                    unityList.Add(unityVersion, unityExe);
+                                    var dataFolder = Path.Combine(directories[i], "Editor", "Data");
+                                    DateTime? installDate = Tools.GetLastModifiedTime(dataFolder);
+                                    // TODO add platforms: PC|iOS|tvOS|Android|UWP|WebGL|Facebook|XBox|PSVita|PS4
+                                    gridUnityList.Rows.Add(unityVersion, unityExe, installDate);
+                                }
+                            } // have unity.exe
+                        }
                     } // got folders
                 } // failed check
             } // all root folders

UnityLauncher/Tools.cs

@@ -183,9 +183,14 @@ public static string GetUnityReleaseURL(string version)
             if (version.Contains("f")) // archived
             {
                 version = Regex.Replace(version, @"f.", "", RegexOptions.IgnoreCase);
-                string padding = "";
-                if (version.Contains("2018.2")) padding = "";
-                url = "https://unity3d.com/unity/whats-new/" + padding + version;
+                string padding = "unity-";
+                string whatsnew = "whats-new";
+                if (version.Contains("5.6")) padding = "";
+                if (version.Contains("2017.1")) whatsnew = "whatsnew";
+                if (version.Contains("2017.4")) padding = "";
+                if (version.Contains("2018")) padding = "";
+                if (version.Contains("2019")) padding = "";
+                url = "https://unity3d.com/unity/"+ whatsnew +"/" + padding + version;
             }
             else
             if (version.Contains("p")) // patch version
@@ -358,9 +363,9 @@ public static string GetProjectVersion(string path)
         /// <returns></returns>
         public static string GetFileVersionData(string path)
         {
-            // TODO check if path exists
             FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(path);
             return fvi.ProductName.Replace("(64-bit)", "").Trim();
+            //return fvi.FileVersion.Replace("(64-bit)", "").Trim();
         }
 
         /// <summary>