diff --git a/CHANGELOG.md b/CHANGELOG.md
index 71febfa..3b3947a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,17 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.3.3] - 2025-07-22
+
+### 🚀 Features
+
+- Add simple utility to detect if dataset uses old 2nd level headers.
+
+### 💼 Other
+
+- Make `use_github=True` default everywhere
+- Simplify `Q`'s query execution a bit
+
 ## [0.3.2] - 2025-07-22
 
 ### 🚀 Features
diff --git a/src/lydata/accessor.py b/src/lydata/accessor.py
index 8138d49..24fc94e 100644
--- a/src/lydata/accessor.py
+++ b/src/lydata/accessor.py
@@ -162,7 +162,6 @@ def __init__(
         self.colname = column
         self.operator = operator
         self.value = value
-        self._column_map = get_default_column_map_old()
 
     def __repr__(self) -> str:
         """Return a string representation of the query."""
@@ -183,12 +182,7 @@ def execute(self, df: pd.DataFrame) -> pd.Series:
         2     True
         Name: col2, dtype: bool
         """
-        try:
-            colname = self._column_map.from_short[self.colname].long
-        except KeyError:
-            colname = self.colname
-
-        column = df[colname]
+        column = df.ly[self.colname]
 
         if callable(self.value):
             return self.value(column)
diff --git a/src/lydata/loader.py b/src/lydata/loader.py
index 741f2a0..7b08d2a 100644
--- a/src/lydata/loader.py
+++ b/src/lydata/loader.py
@@ -143,7 +143,7 @@ def get_content_file(
 
     def get_dataframe(
         self,
-        use_github: bool = False,
+        use_github: bool = True,
         token: str | None = None,
         user: str | None = None,
         password: str | None = None,
diff --git a/src/lydata/utils.py b/src/lydata/utils.py
index deaf046..487af71 100644
--- a/src/lydata/utils.py
+++ b/src/lydata/utils.py
@@ -164,7 +164,7 @@ def get_default_column_map_old() -> _ColumnMap:
 
 
 def _new_from_old(long_name: tuple[str, str, str]) -> tuple[str, str, str]:
-    """Convert an old long name to a new long name.
+    """Convert an old long key name to a new long key name.
 
     >>> _new_from_old(("patient", "#", "neck_dissection"))
     ('patient', 'info', 'neck_dissection')
@@ -179,6 +179,12 @@ def _new_from_old(long_name: tuple[str, str, str]) -> tuple[str, str, str]:
     return (start, middle, end)
 
 
+def is_old(dataset: pd.DataFrame) -> bool:
+    """Check if the dataset uses the old column names."""
+    second_lvl_headers = dataset.columns.get_level_values(1)
+    return "#" in second_lvl_headers or "1" in second_lvl_headers
+
+
 def get_default_column_map_new() -> _ColumnMap:
     """Get the old default column map.
 
diff --git a/src/lydata/validator.py b/src/lydata/validator.py
index 9be9f74..ed46552 100644
--- a/src/lydata/validator.py
+++ b/src/lydata/validator.py
@@ -116,7 +116,7 @@ def validate_datasets(
     year: int | str = "*",
     institution: str = "*",
     subsite: str = "*",
-    use_github: bool = False,
+    use_github: bool = True,
     repo: str = "lycosystem/lydata",
     ref: str = "main",
     **kwargs,