Use the flags setting

module/applications/scene/sceneConfigSettings.mjs

@@ -3,8 +3,6 @@ import DhSceneConfig from '../../data/scene/SceneConfig.mjs';
 export default class DhSceneConfigSettings extends foundry.applications.sheets.SceneConfig {
   constructor(options, ...args) {
     super(options, ...args);
-    // this.settings = new DhSceneConfig();
-    // this.rangeMeasurementSettingsOverrideField = this.settings.initial;
   }
 
   /** @override */
@@ -41,20 +39,4 @@ export default class DhSceneConfigSettings extends foundry.applications.sheets.S
     }
   };
 
-  /** @inheritDoc */
-  async _preparePartContext(partId, context, options) {
-    console.log("_preparePartContext", partId, context, options);
-    context = await super._preparePartContext(partId, context, options);
-    switch (partId) {
-      case "dh":
-        // context.settings = this.settings;
-        // context.rangeMeasurementSettingsOverrideField = this.rangeMeasurementSettingsOverrideField;
-        break;
-      default:
-        context = await super._preparePartContext(partId, context, options);
-    }
-    if (partId in context.tabs) context.tab = context.tabs[partId];
-    return context;
-  }
-
 }

module/canvas/placeables/measuredTemplate.mjs

@@ -11,14 +11,16 @@ export default class DhMeasuredTemplate extends foundry.canvas.placeables.Measur
             if (splitRulerText.length > 0) {
                 const rulerValue = Number(splitRulerText[0]);
                 const result = this.constructor.getRangeLabels(rulerValue, rangeMeasurementSettings);
-                this.ruler.text = result.distance + result.units ? (' ' + result.units) : '' ;
+                this.ruler.text = result.distance + result.units ? (' ' + result.units) : '';
             }
         }
     }
 
     static getRangeLabels(distance, settings) {
-        let result = { distance : '', units: null }
-        if (canvas.scene?.rangeMeasurementSettingsOverride === true) {
+        let result = { distance: '', units: null }
+        const rangeMeasurementOverride = canvas.scene.flags.daggerheart?.rangeMeasurementOverride;
+
+        if (rangeMeasurementOverride === true) {
             result.distance = distance;
             result.units = canvas.scene?.grid?.units;
             return result

module/data/_module.mjs

@@ -7,3 +7,6 @@ export * as actors from './actor/_module.mjs';
 export * as chatMessages from './chat-message/_modules.mjs';
 export * as fields from './fields/_module.mjs';
 export * as items from './item/_module.mjs';
+
+export * as scene from './scene/_module.mjs';
+

module/data/scene/SceneConfig.mjs

@@ -1,15 +0,0 @@
-
-
-export default class DhSceneConfig extends foundry.abstract.DataModel {
-    static defineSchema() {
-        const fields = foundry.data.fields;
-
-        return {
-            ...super.defineSchema(),
-            rangeMeasurementSettingsOverrideField: new fields.BooleanField({
-                initial: false,
-                label: "Override Global Range Measurement Settings"
-            })
-        }
-    }
-}

module/data/scene/_module.mjs

@@ -1 +0,0 @@
-export { default as DhSceneConfig } from './SceneConfig.mjs';

templates/scene/dh-config.hbs

@@ -1,14 +1,9 @@
 <div class="tab{{#if tab.active}} active{{/if}}" data-group="{{tab.group}}" data-tab="{{tab.id}}">
     <div class="form-group">
         <div class="form-fields">
-            <label>
-                <div class="form-group">
-                    <div class="form-fields">
-                        <label>{{localize "Override Global Range Measurement Settings"}}</label>
-                        <input type="checkbox" name="flags.daggerheart.rangeMeasurementOverride" {{checked document.flags.daggerheart.rangeMeasurementOverride}} />
-                    </div>
-                </div>
-            </label>
+            <label>{{localize "Override Global Range Measurement Settings"}}</label>
+            <input type="checkbox" name="flags.daggerheart.rangeMeasurementOverride" {{checked
+                document.flags.daggerheart.rangeMeasurementOverride}} />
         </div>
     </div>
 </div>