1. 官方安装包下载：

https://www.jetbrains.com/zh-cn/idea/download/

2. 补丁下载地址：

https://github.com/cloudlang/IDEA-agent/

3. 重置试用期（推荐）：

Jetbrains系列产品重置试用方法来自：zhile.io

4.BetterIntellij插件+注册码

https://t.1yb.co/gSdH

IntelliJ IDEA 2020.3 (Ultimate Edition)
Build #IU-203.5981.155, built on December 1, 2020
Licensed to https://zhile.io
You have a perpetual fallback license for this version
Subscription is active until July 8, 2089
Runtime version: 11.0.9+11-b1145.21 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 1945M
Cores: 12
Registry: debugger.watches.in.variables=false, compiler.automake.allow.when.app.running=true
Non-Bundled Plugins: CheckStyle-IDEA, com.alibaba.p3c.smartfox, org.sonarlint.idea, JRebelPlugin