x3utils GUI v1.2.6

Caution

SHU compatibility firmware limits

Do not use SHU compatible with these VCU versions or newer:

• F3 VCU 1.6.3
• G3 VCU 1.6.3
• ZT3 VCU 1.5.9
• GT3 VCU 1.7.2 - for reference only: x3utils does not support SHU compatible on GT3 at any version

Check the installed VCU firmware version before continuing. v1.2.6 displays this warning and requires a five-second acknowledgement before entering SHU compatible.

The original firmware is backed up first; if this was already used on newer firmware, restore that backup.

What’s new

• Added separate offline Slice, Pack, and Unpack ZIP3 workflows.
• Added optional, best-effort VCU ZIP3 creation after a successful SHU-compatible flash.
• Added automatic retry after connection failures, while stopping retries once target contact has been established.
• Dumps are staged as .part files and validated before becoming selectable .bin backups.
• Invalid or empty dumps can be moved safely to the OS Trash/Recycle Bin—never permanently deleted.
• All GUI output now uses one user-selected x3utils root with fixed folders for backups, compatibility files, ZIP3 output, and logs.
• Improved Windows path safety using the active system code page instead of rejecting every non-ASCII path.
• Linux and macOS retain Unicode path support, while offline ZIP3 inputs no longer inherit OpenOCD path restrictions.
• Malformed OpenOCD console bytes can no longer abort an otherwise valid run.
• Protection actions now produce one complete GUI log instead of a second partial toolkit transcript.
• Windows protection actions no longer write runtime configuration into the installed application bundle.
• Fixed Linux and macOS protection retry prompts and failure handling.

ZIP3 creation is an offline packaging tool, not a BLE compatibility guarantee. Test created packages through the BLE app’s Load from file flow before relying on them.

Downloads

• Windows installer
• Linux x86_64 AppImage
• macOS universal ZIP

Full changes: gui-v1.2.0…gui-v1.2.6