Do not download this executable from generic DLL or “driver” websites. Many malicious actors package ransomware disguised as legacy Ubiquiti software.
Eventually, you must migrate. Here is the safe path to move to UniFi 7.5+ without losing historical data.
Version 5.4.11 predates Ubiquiti's heavy push for unifi.ui.com remote access. You can run this version completely air-gapped without annoying pop-ups nagging you to sign up for a UI account.
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