此方法僅適用於17及之前版本，18及之後版本請移步至

其實只要裝一個外掛就可以讓idea永遠的用下去了~ 
1.在idea的安裝目錄的bin下面放置這個檔案

檔案獲取方式：連結: https://pan.baidu.com/s/1c253gSo 密碼: cpss

2.修改bin目錄下的兩個檔案

在如上兩個資料夾的最後增加一段程式碼
-javaagent:D:\IDEA\IntelliJ IDEA2017.3\bin\JetbrainsCrack-2.6.10-release-enc.jar
這個目錄地址指的是第一步裡面的檔案的地址

3.重啟idea 
注意！如果之前已經存在註冊碼，可以直接跳到第4步，如果沒有註冊碼，則填寫下面的註冊碼！

BIG3CLIK6F-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-iygsIMXTVeSyYkUxAqpHmymrgwN5InkOfeRhhPIPa88FO9FRuZosIBTY18tflChACznk3qferT7iMGKm7pumDTR4FbVVlK/3n1ER0eMKu2NcaXb7m10xT6kLW1Xb3LtuZEnuis5pYuEwT1zR7GskeNWdYZ0dAJpNDLFrqPyAPo5s1KLDHKpw+VfVd4uf7RMjOIzuJhAAYAG+amyivQt61I9aYiwpHQvUphvTwi0X0qL/oDJHAQbIv4Qwscyo4aYZJBKutYioZH9rgOP6Yw/sCltpoPWlJtDOcw/iEWYiCVG1pH9AWjCYXZ9AbbEBOWV71IQr5VWrsqFZ7cg7hLEJ3A==-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

4.在idea的help的about裡面檢視有效期，這個有效期就變成了到2099年