The window flickers or stays blank
Turn off Settings → Performance → Graphics acceleration, then restart Tenonkit.
A component shows an error
The message on the canvas and under the code says what broke. Ctrl Z undoes your last change.
Reporting a problem
Settings → About → Logs opens the log file. It stays on your computer unless you choose to send it.
Coming from Redesign
Tenonkit used to be called Redesign. The first time it starts, it copies your old projects, themes and settings across and leaves the originals untouched.