Language problem after latest wip install

Hello, after the installation of latest WIP (29 march) I have problem with my Rhino5 installation. The language is mixed up with english and italian. Rhino 5 was italian. Rhino wip english. I have english top menu. Italian toolbars labels. I have coexistent english and italian in the console output window: on the same console line i have right now a string like "Seleziona curva da importare. Press Enter when done.

Thank you