TWRP 3.4.0-0

• Updated TWRP to 3.4.0-0
• Fixed .zip flashing
• Fixed slot switching
• Updated TWRP to android-9.0 branch
• New decryption blobs

TWRP 3.3.1-0

• Updated to TWRP 3.3.1
• Updated to Umbrella 2019-05-17

TWRP 3.3.0-1

• Fixed the Micro SD card not getting detected properly in recovery

TWRP 3.3.0-0

• Updated TWRP to 3.3.0
• Cleaned up the TWRP tree a lot, to the point where it builds without problems in a minimal 8.1 manifest
• Integrated TWRP with the new, upstreamed version of umbrella
• The kernel now includes the wifi driver, it is not loaded as a module from system anymore. This means that
  TWRP should work just fine under Oreo.
• The kernel re-enables the ability to reboot into EDL mode from android. You can do this in TWRP as well.

The new TWRP does have experimental support for Sirocco but I am not able to test it since I dont own one.
If you have an unlocked Sirocco and want to test it, please open an issue and we will see.
(Note that this requires me to send you an A1N build. Don't flash the NB1 one to Sirocco, it will not work.)