需要注释掉原来hosts中关于jetbrains的所有设置，如：
# 0.0.0.0 account.jetbrains.com # 0.0.0.0 www.jetbrains.com
然后试着激活，可能之前的Activation code都会失效，下面放出一个可用的，到2019.11.27过期
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