找到 IntelliJ Idea 的安装路径下的 bin 目录下的 idea.exe.vmoptions (针对 32 位)或 idea64.exe.vmoptions(针对 64 位)，做如下修改：
idea.exe.vmoptions:

-server
-Xms128m
-Xmx512m
-XX:MaxPermSize=250m
-XX:ReservedCodeCacheSize=150m
-ea
-Dsun.io.useCanonCaches=false
-Djava.net.preferIPv4Stack=true
-Djsse.enableSNIExtension=false
-XX:+UseConcMarkSweepGC
-XX:SoftRefLRUPolicyMSPerMB=50

idea64.exe.vmoptions

-Xms128m
-Xmx750m
-XX:MaxPermSize=350m
-XX:ReservedCodeCacheSize=225m
-ea
-Dsun.io.useCanonCaches=false
-Djava.net.preferIPv4Stack=true
-Djsse.enableSNIExtension=false
-XX:+UseConcMarkSweepGC
-XX:SoftRefLRUPolicyMSPerMB=50

破解：
并在后面加上：（jar包路径）
-javaagent:E:\2345下载\安装包\ideaIU-2019.1-jbr11.win\bin\JetbrainsIdesCrack-4.2-release-sha1-3323d5d0b82e716609808090d3dc7cb3198b8c4b.jar

注册码：

56ZS5PQ1RF-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-SYSsDcgL1WJmHnsiGaHUWbaZLPIe2oI3QiIneDtaIbh/SZOqu63G7RGudSjf3ssPb1zxroMti/bK9II1ugHz/nTjw31Uah7D0HqeaCO7Zc0q9BeHysiWmBZ+8bABs5vr25GgIa5pO7CJhL7RitXQbWpAajrMBAeZ2En3wCgNwT6D6hNmiMlhXsWgwkw2OKnyHZ2dl8yEL+oV5SW14t7bdjYGKQrYjSd4+2zc4FnaX88yLnGNO9B3U6G+BuM37pxS5MjHrkHqMTK8W3I66mIj6IB6dYXD5nvKKO1OZREBAr6LV0BqRYSbuJKFhZ8nd6YDG20GvW6leimv0rHVBFmA0w==-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