Download of PHIXER 1.2.3 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software is an intellectual property of Riverflux Audio (Youcef Maamri). We recommend checking the downloaded files with any free antivirus.
From the developer:
PHIXER is Riverflux Audio's free stereo phase-repair plugin for Windows, macOS, and Linux in VST3, CLAP, and AU formats.
It targets destructive left/right spectral phase relationships that cancel bass and punch when a mix collapses to mono. PHIXER uses frequency-aware phase rotation - not a simple polarity flip, and not a mic time-alignment / delay-matching tool.
You may want to check out more software, such as LockPhix, which might be related to PHIXER.