注意：配置之前关掉idea界面
第一步：找到idea.properties 文件，具体操作如下：
①桌面快解方式，右键打开文件所在位置
②在当前目录下，找到idea.properties
第二步：更改idea.properties
原有配置为：
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE config folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.config.path=${user.home}/.IntelliJIdea/config
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE system folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.system.path=${user.home}/.IntelliJIdea/system更改后为：
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE config folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
idea.config.path=D:\IntelliJIdeaCache/.IntelliJIdea/config
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE system folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
idea.system.path=D:\IntelliJIdeaCache/.IntelliJIdea/system注意：将#删掉
第三步：将原有目录下的config和system 目录内容复制到对应新的目录里面
此步操作很关键，主要是为了复制config。避免IDEA 认为这是一个新的安装实例，需要重新激活的操作。
第四步：打开idea，即可。