If you find a "free" Deep Glow that is version 1.0 or 1.2, it on modern Macs with Apple Silicon (M1/M2/M3) or Windows 11 with AE 2025. It will show a "Missing Effect" error.
If you are looking for that specific "deep" glow look without the cost, consider these highly-rated free options: AfterGlow (Preset) : A free preset by Creation Effects deep glow after effects plugin free updated
If you really want the real Deep Glow plugin (the one that is updated for Multi-Frame Rendering and AE 2025), here is how to save money: If you find a "free" Deep Glow that is version 1