handle version parse fail and reorder last manifest fetch date

Author: jjw24

Flow.Launcher.Core/ExternalPlugins/PluginsManifest.cs

@@ -43,8 +43,6 @@ public static async Task<bool> UpdateManifestAsync(bool usePrimaryUrlOnly = fals
                     if (results.Count == 0)
                         return false;
 
-                    lastFetchedAt = DateTime.Now;
-
                     var updatedPluginResults = new List<UserPlugin>();
                     var appVersion = SemanticVersioning.Version.Parse(Constant.Version);
 
@@ -56,6 +54,8 @@ public static async Task<bool> UpdateManifestAsync(bool usePrimaryUrlOnly = fals
 
                     UserPlugins = updatedPluginResults;
 
+                    lastFetchedAt = DateTime.Now;
+
                     return true;
                 }
             }
@@ -73,9 +73,21 @@ public static async Task<bool> UpdateManifestAsync(bool usePrimaryUrlOnly = fals
 
         private static bool IsMinimumAppVersionSatisfied(UserPlugin plugin, SemanticVersioning.Version appVersion)
         {
-            if (string.IsNullOrEmpty(plugin.MinimumAppVersion) || appVersion >= SemanticVersioning.Version.Parse(plugin.MinimumAppVersion))
+            if (string.IsNullOrEmpty(plugin.MinimumAppVersion))
                 return true;
 
+            try
+            {
+                if (appVersion >= SemanticVersioning.Version.Parse(plugin.MinimumAppVersion))
+                    return true;
+            }
+            catch (Exception e)
+            {
+                API.LogException(ClassName, $"Failed to parse the minimum app version {plugin.MinimumAppVersion} for plugin {plugin.Name}. "
+                    + "Plugin excluded from manifest", e);
+                return false;
+            }
+
             API.LogDebug(ClassName, $"Plugin {plugin.Name} requires minimum Flow Launcher version {plugin.MinimumAppVersion}, "
                     + $"but current version is {Constant.Version}. Plugin excluded from manifest.");