Temporarily disable your antivirus or add your DAW to the . Ensure the following default paths aren't being blocked:

C:\Users\Public\Public Documents\Soundtoys\Soundtoys 5 Mac: /Users/Shared/Soundtoys/Soundtoys 5 4. Perform a Clean Reinstall

If running as admin fails, the specific target folder likely has incorrect permissions.

Open (or your third-party antivirus control panel).

Soundtoys V5 Preset location, presets not saving and hardlinks