diff --git a/SrcJySet.js b/SrcJySet.js
index 094e9f00..29af7714 100644
--- a/SrcJySet.js
+++ b/SrcJySet.js
@@ -1938,8 +1938,9 @@ function resource() {
                         }
                         return names;
                     }
-                    let files = readDir(input).filter(v=>v.endsWith('.js')).map(v=>input+v);
-                    log(files);
+                    let oldfiles = readDir(datapath+'libs_jk/');
+                    let newfiles = readDir(input).filter(v=>v.endsWith('.js') && oldfiles.filter(o=>o.includes(v).length==0)).map(v=>input+v);
+                    log(newfiles);
                     return "toast://111";
                 }