Hotfix/econometrics export filename fix

openbb_terminal/econometrics/econometrics_controller.py

@@ -471,15 +471,15 @@ def call_export(self, other_args: List[str]):
         if other_args and "-" not in other_args[0][0]:
             other_args.insert(0, "-n")
         ns_parser = self.parse_known_args_and_warn(
-            parser, other_args, export_allowed=NO_EXPORT
+            parser, other_args, export_allowed=EXPORT_BOTH_RAW_DATA_AND_FIGURES
         )
 
         if ns_parser:
             if not ns_parser.name or ns_parser.name not in self.datasets:
                 console.print("Please enter a valid dataset.")
             else:
                 export_data(
-                    ns_parser.type,
+                    ns_parser.export if ns_parser.export != "" else ns_parser.type,
                     os.path.dirname(os.path.abspath(__file__)),
                     ns_parser.name,
                     self.datasets[ns_parser.name],

openbb_terminal/helper_funcs.py

@@ -1602,15 +1602,28 @@ def export_data(
                     )
 
                 elif saved_path.exists():
+                    # Load the Excel file to get the existing data
+                    existing_df = pd.read_excel(saved_path, sheet_name=sheet_name)
+                    # Get the number of rows in the existing data
+                    start_row = (
+                        existing_df.shape[0] + 1
+                    )  # Add 1 to start writing after the last row
+
+                    # Append data to the existing sheet
                     with pd.ExcelWriter(
                         saved_path,
                         mode="a",
-                        if_sheet_exists="new",
+                        if_sheet_exists="overlay",
                         engine="openpyxl",
                     ) as writer:
                         df.to_excel(
-                            writer, sheet_name=sheet_name, index=True, header=True
+                            writer,
+                            sheet_name=sheet_name,
+                            startrow=start_row,
+                            index=True,
+                            header=False,
                         )
+
                 else:
                     with pd.ExcelWriter(
                         saved_path,