Description:
The "Frosted glass" setting (Appearance > Background) is lost every time the application is restarted, even though it was enabled in the previous session.

Reproduction Steps:

Go to Settings > Window > Appearance.

Enable "Frosted glass". (The effect applies correctly at this point).

Close Tabby completely and restart the application.

Actual Result: The frosted glass effect is gone, and I have to re-enable it in settings.

Expected Result: The frosted glass effect should remain active across restarts.

Environment:

Tabby version: 1.0.230

OS:
Version: Windows 10 Home

Build Number: 22H2

Installation Date: 2022/4/11

OS Build Number: 19045.6466