Human version of updates here https://blog.coinkite.com/5.2.1-released/
- Mk4: Version 5.2.1 - Dec 19, 2023#
- New Feature: Temporary Seed import from a COLDCARD encrypted backup.
- New Feature: Export seed words in SeedQR format (on screen QR).
- New Feature: Provide user with info about transaction level timelocks (nLockTime, nSequence) when signing.
- Enhancement: New submenu for saved BIP-39 Passphrases allowing delete of saved entries.
- Enhancement: Add current temporary seed to Seed Vault from within Seed Vault menu. If current seed is temporary and not saved yet, Add current tmp menu item is shown in Seed Vault menu.
- Enhancement: Speed up opening Passphrase menu when MicroSD card is available, by deferring card read (and decryption) until after Restore Saved menu item is selected.
- Enhancement: 12 Words menu option preferred on the top of the menu in all the seed menus (rather than 24 words).
- Enhancement: Allow passphrase via USB if passphrase already set operates on master seed.
- Enhancement: Improve BIP39 Passphrase UX when temporary seed is active and applicable.
- Enhancement: Continuation of removal of obsolete Mk2/Mk3 code-paths from master branch.
- Bugfix: Confusing first-time UX replaced with simple welcome screen.
- Bugfix: One instant retry on SE1 communication failures
- Bugfix: Handle any failures in slot reading when loading settings
- Bugfix: Add missing "First Time UX" for extended key import as master seed
- Bugfix: Hide Upgrade Firmware menu item if temporary seed is active (it cannot work)
- Bugfix: Disallow using master seed as temporary seed
- Bugfix: Do not allow APPLY of empty BIP-39 passphrase. Use "Restore Master" instead.
- Bugfix: Fix yikes in Clone Coldcard (thanks to AnchorWatch)