### v2.2.1
- Fixed: opening a new image inherited the previous image's processing parameters and palette (e.g. every image got the previously selected 4-color palette) — every new image now starts with default parameters and no palette, while the selected algorithm is kept.
- Preference learning no longer records or recommends palettes; it only learns your algorithm and parameter preferences (palettes stored in older learning records are ignored — no need to clear them manually).
- Startup no longer restores the last-used palette or processing parameters (the selected algorithm is still restored).