1.程序安装包：
https://download.jetbrains.8686c.com/idea/ideaIU-2018.3.exe
3.双击程序安装包把 IDEA 装好，但是不要打开
4.打开IDEA目录下的bin目录，将破解补丁文件放到安装目录的bin目录下，找到idea.exe.vmoptions(32位系统)或idea64.exe.vmoptions(64位系统)，用记事本或其它编辑器打开，然后分别修改 idea.exe.vmoptions 和 idea64.exe.vmoptions这两个文件，在文件末尾添加如下的配置：-javaagent:D:/application/IntelliJ IDEA 2018.3/bin/JetbrainsIdesCrack-4.2-release-enc.jar。注意，安装目录换成自己的安装目录。
5.输入激活码
此时我们打开IDEA，在一些基础的设置后，会弹出让你输入激活码的窗口
这里我们选择中间的Activation code，并在下面的输入框中粘贴如下内容：
ThisCrackLicenseId-{
"licenseId":"ThisCrackLicenseId",//随便填
"licenseeName":"idea",//你的名字
"assigneeName":"",//你的名字
"assigneeEmail":"idea@163.com",//你的邮箱
"licenseRestriction":"For This Crack, Only Test! Please support genuine!!!",//激活信息
"checkConcurrentUse":false,
"products":[//各个产品的代码以及过期时间
{"code":"II","paidUpTo":"2099-12-31"},
{"code":"DM","paidUpTo":"2099-12-31"},
{"code":"AC","paidUpTo":"2099-12-31"},
{"code":"RS0","paidUpTo":"2099-12-31"},
{"code":"WS","paidUpTo":"2099-12-31"},
{"code":"DPN","paidUpTo":"2099-12-31"},
{"code":"RC","paidUpTo":"2099-12-31"},
{"code":"PS","paidUpTo":"2099-12-31"},
{"code":"DC","paidUpTo":"2099-12-31"},
{"code":"RM","paidUpTo":"2099-12-31"},
{"code":"CL","paidUpTo":"2099-12-31"},
{"code":"PC","paidUpTo":"2099-12-31"}
],
"hash":"2911276/0",
"gracePeriodDays":7,
"autoProlongated":false}
6. 最后点击OK，此时我们就得到一个2100年到期的IDEA了，破解完成！
7.总结：输入激活码后如果出现 key is invalid 的情况是因为破解补丁的版本太低了，下载高版本的就行