v0.5.1

Fixed

• The preview no longer relies on the browser's image element to decode a rendered page. Pages are decoded directly from the render response and painted to the device canvas, which fixes the preview freezing on machines where that decoder stalls: knob changes that only appeared after Reset device preview, and press and hold sometimes staying on the untuned view until another knob moved.
• A page that cannot be decoded now says so over the sheet instead of silently keeping the previous page up.
• The Windows tool wrapper looks at its cache before it requires a download URL, which is what the Unix wrapper already did. An ordinary launch is unaffected, offline ones included: the launcher sets the URL whether or not anything is fetched.

Full changelog