Operation guide:

1. add -javaagent:/path/to/ja-netfilter.jar=jetbrains to your vmoptions (manual or auto)
2. use key on page or default page
3. don't care about the activation time, it is a fallback license and will not expire

Enjoy it~

JBR17:

add these 2 lines to your vmoptions file: (for manual, without any whitespace chars)

--add-opens=java.base/jdk.internal.org.objectweb.asm=ALL-UNNAMED
--add-opens=java.base/jdk.internal.org.objectweb.asm.tree=ALL-UNNAMED

NEW:
 Auto configure vmoptions:
  macOS or Linux: execute "scripts/install.sh"
  Windows: double click to execute "scripts\install-current-user.vbs" (For current user) or "scripts\install-all-users.vbs" (For all users)