some fixes

src/main/java/me/mmmjjkx/bbox/moreflags/MoreFlagsAddon.java

@@ -37,6 +37,7 @@ private void registerFlags(EntityListener entityListener) {
     @Override
     public void onReload() {
         super.onReload();
+        saveConfig();
 
         settings = new Config<>(this, Settings.class).loadConfigObject();
 
@@ -55,12 +56,9 @@ private void registerFlagSet(String id, Material icon, FlagSet flagSet, Listener
                     .mode(Flag.Mode.EXPERT)
                     .listener(listener)
                     .type(Flag.Type.SETTING)
-                    .defaultSetting(flagSet.getDefaultValue())
                     .cooldown(flagSet.getChangeCooldown())
                     .build();
             registerFlag(flag);
-
-            flag.setDefaultSetting(flagSet.getDefaultValue());
         }
     }
 }

src/main/java/me/mmmjjkx/bbox/moreflags/config/FlagSet.java

@@ -4,18 +4,14 @@
 import lombok.Setter;
 import world.bentobox.bentobox.api.configuration.ConfigEntry;
 
+@Getter
 @Setter
 public class FlagSet {
-    @Getter
+    public FlagSet() {
+    }
+
     @ConfigEntry(path = "enabled")
     private boolean enabled = true;
-    @Getter
     @ConfigEntry(path = "change-cooldown")
     private int changeCooldown = 0;
-    @ConfigEntry(path = "default-value")
-    private boolean defaultValue = false;
-
-    public boolean getDefaultValue() {
-        return defaultValue;
-    }
 }

src/main/java/me/mmmjjkx/bbox/moreflags/config/FlagSetSerializer.java

@@ -0,0 +1,33 @@
+package me.mmmjjkx.bbox.moreflags.config;
+
+import org.bukkit.configuration.MemorySection;
+import world.bentobox.bentobox.database.objects.adapters.AdapterInterface;
+
+import java.util.Map;
+
+public class FlagSetSerializer implements AdapterInterface<FlagSet, Map<String, Object>> {
+
+    public FlagSetSerializer() {
+    }
+
+    @Override
+    public FlagSet deserialize(Object o) {
+        FlagSet flagSet = new FlagSet();
+        if (o instanceof MemorySection ms) {
+            flagSet.setEnabled(ms.getBoolean("enabled"));
+            flagSet.setChangeCooldown(ms.getInt("change-cooldown"));
+        }
+        return flagSet;
+    }
+
+    @Override
+    public Map<String, Object> serialize(Object o) {
+        if (o instanceof FlagSet fs) {
+            boolean enabled = fs.isEnabled();
+            int changeCooldown = fs.getChangeCooldown();
+            return Map.of("enabled", enabled, "change-cooldown", changeCooldown);
+        } else {
+            return null;
+        }
+    }
+}

src/main/java/me/mmmjjkx/bbox/moreflags/config/Settings.java

@@ -3,20 +3,24 @@
 import lombok.Getter;
 import lombok.Setter;
 import world.bentobox.bentobox.api.configuration.*;
+import world.bentobox.bentobox.database.objects.adapters.Adapter;
 
-@StoreAt(filename = "config.yml")
+@StoreAt(filename = "config.yml", path = "flags")
 @Getter
 @Setter
 public class Settings implements ConfigObject {
-    @ConfigEntry(path = "flags.creeper_explosion")
+    @ConfigEntry(path = "creeper_explosion")
     @ConfigComment("It can control creeper explosions.")
+    @Adapter(FlagSetSerializer.class)
     private FlagSet creeperExplosions = new FlagSet();
 
-    @ConfigEntry(path = "flags.wither_explosion")
+    @ConfigEntry(path = ".wither_explosion")
     @ConfigComment("It can control wither explosions.")
+    @Adapter(FlagSetSerializer.class)
     private FlagSet witherExplosions = new FlagSet();
 
-    @ConfigEntry(path = "flags.phantom_spawning")
+    @ConfigEntry(path = "phantom_spawning")
     @ConfigComment("It can control phantom spawning.")
+    @Adapter(FlagSetSerializer.class)
     private FlagSet phantomSpawning = new FlagSet();
 }

src/main/resources/config.yml

@@ -2,12 +2,9 @@ flags:
   creeper_explosion:
     enabled: true
     change-cooldown: 0
-    default-value: true
   wither_explosion:
     enabled: true
     change-cooldown: 0
-    default-value: true
   phantom_spawning:
     enabled: true
-    change-cooldown: 0
-    default-value: true
+    change-cooldown: 0