Fix crashes when no VS dir is autodetected or manually set

.gitignore

@@ -2,4 +2,5 @@ bin/
 obj/
 /packages/
 riderModule.iml
-/_ReSharper.Caches/
+/_ReSharper.Caches/
+releases/

Properties/AssemblyInfo.cs

@@ -32,6 +32,6 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.1.0.0")]
-[assembly: AssemblyFileVersion("0.1.0.0")]
+[assembly: AssemblyVersion("0.1.1.0")]
+[assembly: AssemblyFileVersion("0.1.1.0")]
 [assembly: ComponentFactory(typeof(VampireSurvivorsFactory))]

UI/Components/VampireSurvivorsComponent.cs

@@ -28,12 +28,16 @@ public class VampireSurvivorsComponent : ControlComponent {
             Settings = new VampireSurvivorsSettings();
             _control = (VampireSurvivorsControl)Control;
             ResetState();
-            
+
             CurrentState.OnStart += state_OnStart;
             CurrentState.OnReset += state_OnReset;
         }
 
         private void state_OnStart(object sender, EventArgs e) {
+            if (string.IsNullOrEmpty(Settings.VsInstallDir)) {
+                return;
+            }
+
             _saveWatcher = new FileSystemWatcher(Path.Combine(Settings.VsInstallDir, SaveData.SaveDataDir));
             _saveWatcher.Filter = SaveData.SaveDataFile;
             _saveWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.Size | NotifyFilters.CreationTime;
@@ -52,7 +56,7 @@ out State state
         private void state_OnReset(object sender, TimerPhase _) => StopWatching();
 
         private void StopWatching() {
-            _saveWatcher.Dispose();
+            _saveWatcher?.Dispose();
             _saveWatcher = null;
             ResetState();
         }

UI/Components/VampireSurvivorsFactory.cs

@@ -1,12 +1,13 @@
 using System;
+using System.Reflection;
 using LiveSplit.Model;
 
 namespace LiveSplit.UI.Components {
     public class VampireSurvivorsFactory : IComponentFactory {
         public string ComponentName => "Vampire Survivors Tracker";
         public string Description => "Displays achievements obtained so far in the current Vampire Survivors run.";
 
-        public Version Version => Version.Parse("0.1.0");
+        public Version Version => Assembly.GetExecutingAssembly().GetName().Version;
         public ComponentCategory Category => ComponentCategory.Information;
 
         public string UpdateName => ComponentName;

UI/Components/VampireSurvivorsSettings.cs

@@ -50,9 +50,12 @@ private void btnSelectVsDir_Click(object sender, EventArgs e) {
                     MessageBoxButtons.OK,
                     MessageBoxIcon.Error
                 );
+                txtVsDir.Text = "";
+                VsInstallDir = null;
                 return;
             }
 
+            txtVsDir.Text = vsDir;
             VsInstallDir = vsDir;
         }