The addon UI can be found on the sidebar of the 3D Viewport under a tab called Lattice tools,

the default hotkey to show the sidebar is N.

Every element of the addon UI has a tooltip so if you don’t know what something does just hover your mouse cursor over it.

--Change Log--

June 2026 (1.2.3)

• Generated lattice objects are now placed in the same collection(s) as the target object instead of the active collection.
• Group lattice generation now places the shared lattice in the selected target object's collection.
• Proportional editing is now disabled by default after generating a lattice.

September 2025 (1.2.2)

• Added blender_manifest.toml for Blender 4.2+ extension support.
• Fixed lattice generation in Individual mode.
• Removed the unwanted MultiLattice panel from the Misc category.

April 2024 (1.2.1)

• Fixed dimension issue on Blender 4.1.

December 4, 2021 (1.1.4)

• Added Blender 3.0 support.
• Added quick rotation operator.
• Updated the UI. The transform panel is now separated into a collapsible subpanel.
• Fixed errors when applying in multiple-user mesh data. The add-on now shows a confirmation popup before continuing.

September 13, 2021 (1.1.3)

• Added the Copy Lattice Resolution button.
• Kept empty lattice modifiers when present on the selected object.
• Updated the UI.

September 8, 2021 (1.12)

• Default name can be changed in settings.
• Fixed inaccurate lattice dimensions when Copy Rotation is unchecked.
• Minor improvements.

September 3, 2021 (1.01)

• Initial release.