好多文章说直接去idea官网下，并给出官网地址，然后就是修改配置文件，同时附上其说的那个版本的破解码。
以为这样就可以成功破解了，no，往往官网上下的版本都是比较新的版本，而给的破解码都是比较老的，二者不匹配，所以。。。

1.这边直接给出2018.3.1版的下载地址，点击下载即可

2.破解jar包下载：JetbrainsIdesCrack-3.4-release-enc.jar，点击下载即可

3.把破解jar包JetbrainsIdesCrack-3.4-release-enc.jar放在安装目录的bin目录下

4、修改bin目录里面的两个配置文件idea64.exe.vmoptions（64位系统）、idea.exe.vmoptions（32位系统），添加一行内容

为-javaagent:F:/idea/IntelliJ IDEA 2018.3.1/bin/JetbrainsIdesCrack-3.4-release-enc.jar，添加时前后都要留一行空行（注意路径

中是反斜杠，请根据自己的实际路径替换）

5、启动idea，选择注册码激活（Activation code），输入以下注册码：

ThisCrackLicenseId-{
"licenseId":"ThisCrackLicenseId",
"licenseeName":"you",
"assigneeName":"good",
"assigneeEmail":"bukengnikengshui@126.com",
"licenseRestriction":"For This Crack, Only Test! Please support genuine!!!",
"checkConcurrentUse":false,
"products":[
{"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.可以看到授权有效期到2100年，这样就可以正常使用了

希望可以给有需要的小伙伴提供帮助，少走些弯路吧！！！

参考自https://blog.csdn.net/xiaocy66/article/details/83902477