fixed encrypted archives

src/main/java/cz/kamma/kfmanager/service/FileOperations.java

@@ -939,6 +939,13 @@ public class FileOperations {
             return false;
         }
 
+        // Known archive extensions should always be considered openable.
+        // Some encrypted archives cannot be probed with lightweight readers
+        // but are still supported by the real extraction path.
+        if (isArchiveFile(file)) {
+            return true;
+        }
+
         // Always try to detect format by actually reading the file content
         // This works for any file regardless of extension
         return tryDetectArchiveFormat(file);

src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java

@@ -4928,7 +4928,7 @@ public class FilePanelTab extends JPanel {
 
                     @Override
                     public boolean isCancelled() { 
-                        return progressDialog == null || !progressDialog.isVisible();
+                        return progressDialog == null || progressDialog.isCancelled();
                     }
 
                     @Override