Fixed #119

HMCLAPI/build.gradle

@@ -16,18 +16,10 @@
  * along with this program.  If not, see {http://www.gnu.org/licenses/}.
  */
 
-buildscript {
-    repositories {
-        mavenCentral();
-        
-        dependencies {
-            classpath 'me.tatarka:gradle-retrolambda:3.1.0'
-        }
-    }
+plugins {
+    id "me.tatarka.retrolambda" version "3.5.0"
 }
 
-apply plugin: 'me.tatarka.retrolambda'
-
 if (System.getenv("BUILD_NUMBER") != null)
     version = System.getenv("BUILD_NUMBER")
 

HMCLAPI/src/main/java/org/jackhuang/hmcl/api/PluginManager.java

@@ -37,7 +37,7 @@ import org.jackhuang.hmcl.api.func.Consumer;
  */
 public class PluginManager {
 
-    private static final File PLUGINS_FILE = new File("plugins/");
+    private static final File PLUGINS_FILE = new File("plugins").getAbsoluteFile();
     private static final ArrayList<IPlugin> PLUGINS = new ArrayList<>();
 
     public static void getPlugin(Class<?> cls) {