Cannot horizontally resize lancelot window

Suddenly Lancelot window (panel widget) was resized and not it is very narrow.

The thing is I can resize the window vertically, but horizontally I cannot. When I put the pointer on the right or left edge of lancelot window the pointer becomes the resize pointer, but usual click and drag does not do anything on the window. Vertically it works fine.

Can I just delete Lancelot setting file to reset it? It seems I could not find where the settings are.

Thank you!

Never mind. Killing lancelot solved the problem. I thought I closed lancelot, but apparently it was running in the backgruond and that was why the manually edited settings was not applied.