两个建议哈。

1、下载单文件可以用，inet.httpFile

2、process.exploreSelect 在win11中实测是存在问题的，稳定性不太对

import win.ui;
/*DSG{{*/
var winform = win.form(text="下载网站css或js";right=664;bottom=290;max=false)
winform.add(
buttonClose={cls="button";text="退出";left=348;top=204;right=498;bottom=262;color=14120960;font=LOGFONT(h=-14);note=" ";z=4};
buttonSave={cls="button";text="保存";left=162;top=204;right=312;bottom=262;color=14120960;font=LOGFONT(h=-14);note=" ";z=2};
editUrl={cls="edit";left=79;top=36;right=538;bottom=182;edge=1;multiline=1;style=1539;z=1};
static={cls="static";text="下载网址（自动换行）";left=79;top=12;right=368;bottom=33;transparent=1;z=3}
)
/*}}*/

import process;
import inet.httpFile;
import console;

winform.editUrl.text = "http://cdn.staticfile.org/layui/2.8.12/layui.js";

winform.buttonSave.oncommand = function(id,event){
    path = "/"++string.match(winform.editUrl.text,".*\/(.*)")
    http = inet.httpFile(winform.editUrl.text,path);   
    res = http.download() 
    if(res && http.complete){
        http.close();
    	process.execute('/')    
    }
	
}

winform.buttonClose.oncommand = function(id,event){
    win.quitMessage()
}

winform.show();
win.loopMessage();