Fixed handle bad icon when saving

MainForm.cs

@@ -654,6 +654,11 @@ namespace FizzyLauncher
                     case ".jsnx":
                         this.CurrentSession = await RyzStudio.IO.Compression.ZFile.ReadFile<AppOptions>(filename, "Document.json");
 
+                        if (this.CurrentSession == null)
+                        {
+                            this.CurrentSession = new AppOptions();
+                        }
+
                         // Load icons
                         this.CurrentSession = await LoadIconsFromZipFile(filename, this.CurrentSession);
 
@@ -997,6 +1002,8 @@ namespace FizzyLauncher
 
                         zipEntry = archive.CreateEntry(key, CompressionLevel.SmallestSize);
 
+                        try
+                        {
                             using (Stream entryStream = zipEntry.Open())
                             {
                                 using (Image image = item.Icon)
@@ -1004,7 +1011,11 @@ namespace FizzyLauncher
                                     image.Save(entryStream, ImageFormat.Png);
                                 }
                             }
-
+                        }
+                        catch (Exception)
+                        {
+                            continue;
+                        }
                     }
                 }
             }