Updated to 2.0.7 (view the changelog on the Spigot update).

src/nl/marido/deluxeheads/DeluxeHeads.java

@@ -20,6 +20,7 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.scheduler.BukkitRunnable;
 
 import nl.marido.deluxeheads.cache.CacheFile;
 import nl.marido.deluxeheads.cache.CacheHead;
@@ -108,23 +109,25 @@ public class DeluxeHeads extends JavaPlugin implements Listener {
 	}
 
 	private void checkForUpdates() {
-		async(() -> {
-			try {
-				String currentVersion = UpdateChecker.getCurrentVersion();
-				String latestVersion = UpdateChecker.getLatestVersion();
-				if (!UpdateChecker.isNewerVersion(latestVersion)) {
-					String newversion = Lang.Updater.newVersion().toString();
-					newversion = newversion.replaceAll("%version%", currentVersion);
-					severe(newversion);
-					return;
+		new BukkitRunnable() {
+			public void run() {
+				try {
+					String currentVersion = UpdateChecker.getCurrentVersion();
+					String latestVersion = UpdateChecker.getLatestVersion();
+					if (!UpdateChecker.isNewerVersion(latestVersion)) {
+						String newversion = Lang.Updater.newVersion().toString();
+						newversion = newversion.replaceAll("%version%", currentVersion);
+						severe(newversion);
+						return;
+					}
+					String oldversion = Lang.Updater.oldVersion().toString();
+					oldversion = oldversion.replaceAll("%version%", currentVersion);
+					warning(oldversion);
+				} catch (IOException e) {
+					severe("There was an error checking for an update for Heads");
 				}
-				String oldversion = Lang.Updater.oldVersion().toString();
-				oldversion = oldversion.replaceAll("%version%", currentVersion);
-				warning(oldversion);
-			} catch (IOException e) {
-				severe("There was an error checking for an update for Heads");
 			}
-		});
+		}.runTaskAsynchronously(DeluxeHeads.getInstance());
 	}
 
 	private void registerCommands() {
@@ -421,10 +424,6 @@ public class DeluxeHeads extends JavaPlugin implements Listener {
 		Bukkit.getScheduler().runTask(instance, task);
 	}
 
-	public static void async(Runnable task) {
-		Bukkit.getScheduler().runTaskAsynchronously(instance, task);
-	}
-
 	public static FileConfigFile getVersionedConfig(String resource) {
 		if (Version.isBelow(Version.v1_13))
 			return new FileConfigFile(resource, "pre1_13/" + resource);

src/nl/marido/deluxeheads/cache/CacheFile.java

@@ -21,6 +21,8 @@ import java.util.function.Consumer;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
+import org.bukkit.scheduler.BukkitRunnable;
+
 import nl.marido.deluxeheads.DeluxeHeads;
 import nl.marido.deluxeheads.handlers.Search;
 import nl.marido.deluxeheads.util.Checks;
@@ -97,12 +99,13 @@ public final class CacheFile implements Mod {
 
 	public void searchHeadsAsync(String query, Consumer<List<CacheHead>> onResult) {
 		List<CacheHead> headsCopy = new ArrayList<>(heads);
+		new BukkitRunnable() {
+			public void run() {
+				List<CacheHead> matches = Search.searchHeads(query, headsCopy, 0.4d);
 
-		DeluxeHeads.async(() -> {
-			List<CacheHead> matches = Search.searchHeads(query, headsCopy, 0.4d);
-
-			DeluxeHeads.sync(() -> onResult.accept(matches));
-		});
+				DeluxeHeads.sync(() -> onResult.accept(matches));
+			}
+		}.runTaskAsynchronously(DeluxeHeads.getInstance());
 	}
 
 	public CacheHead findHead(int id) {

src/nl/marido/deluxeheads/oldmenu/mode/GetMode.java

@@ -44,7 +44,7 @@ public class GetMode extends BaseMode {
 
 	@Override
 	public boolean canOpenCategory(String category) {
-		if (getPlayer().hasPermission("heads.category." + category.toLowerCase().replace(' ', '_'))) {
+		if (getPlayer().hasPermission("deluxeheads.category." + category.toLowerCase().replace(' ', '_'))) {
 			return true;
 		} else {
 			Lang.Menu.Get.categoryPermission(category).send(getPlayer());

src/plugin.yml

@@ -2,7 +2,7 @@ main: nl.marido.deluxeheads.DeluxeHeads
 author: Marido
 name: DeluxeHeads
 description: Enhance your server with over 17,000 awesome unique heads with amazing features.
-version: 2.1.6
+version: 2.1.7
 api-version: 1.13
 softdepend: [Vault, PlayerPoints, BlockStore]
 loadbefore: [DeluxeMenus]