diff --git a/dzgui/controllers/mc.py b/dzgui/controllers/mc.py
index 536d581..65015c4 100644
--- a/dzgui/controllers/mc.py
+++ b/dzgui/controllers/mc.py
@@ -7,6 +7,8 @@ from pathlib import Path
 from typing import Any, Callable, TYPE_CHECKING
 
 import dzgui.api.pefile as PeFile
+import dzgui.util._json as JSON  # noqa
+
 from dzgui.api.probe import test_steam_api, test_bm_api
 from dzgui.api.mods import (
     get_delimited_mods,
@@ -176,6 +178,26 @@ class Controller:
         self.toggle_config(Preferences.DEBUG)
 
     def save_res_and_quit(self, *args: Any) -> None:
+        treeview = self.mediator.notebook.servers.get_active_treeview()
+        columns = treeview.get_columns()
+
+        columns_file = self.prefs.paths.columns
+        try:
+            data = JSON.read_json(columns_file)
+        except Exception as e:
+            logger.critical(e)
+            data = {"cols": {}}
+
+        for column in columns:
+            title = column.get_title()
+            size = column.get_width()
+            data["cols"][title] = size
+
+        try:
+            JSON.write_json(data, columns_file)
+        except Exception as e:
+            logger.critical(e)
+
         if self.mediator.window.props.is_maximized:
             Gtk.main_quit()
             return
diff --git a/dzgui/views/trees/tree_servers.py b/dzgui/views/trees/tree_servers.py
index e428b0d..3f98170 100644
--- a/dzgui/views/trees/tree_servers.py
+++ b/dzgui/views/trees/tree_servers.py
@@ -133,24 +133,9 @@ class ServerTreeView(TreeView):
         """
         Propagate width change to other tabs
         """
-        # TODO: only update res file on quit
         title = col.get_title()
         size = col.get_width()
 
-        prefs = self.controller.get_prefs()
-        columns = prefs.paths.columns
-        try:
-            data = JSON.read_json(columns)
-            data["cols"][title] = size
-        except Exception as e:
-            logger.critical(e)
-            data = {"cols": {title: size}}
-
-        try:
-            JSON.write_json(data, columns)
-        except Exception as e:
-            logger.critical(e)
-
         # NOTE: get final width after drag action completes
         GLib.idle_add(self.controller.propagate_column_width, col)