New GUI for Emc available for testing...

Hello, Im new to linux cnc and trying to change the gui. I installed mocca25 and used the setup wizard for english. everything goes ok and fine. I load Linux cnc and the new gui loads and i can see buttons but before the linuxcnc loading goes away my screen turns black with a _ in the upper left corner and then the signal completely turns off to my monitor. The only thing I can do is reboot..

How do i fix this problem?
In the mean time how do I go back to the axis gui?

Thanks!

Tried that gave a load error after rebooting it worked. any ideas on the black screen?