Ue4 BUG: can not change most settings in editor

hey,
i have a big problem… I can not click any buttons in ue4!

Not able to click the topleft buttons (file, edit, window, help)
Not able to change folder settings
and Not able to change the most editable settings, where i have to click a button.

i can change functions in my blueprint but not the editable buttons (as example not the “mesh” or the “animation mode”)

There are much much more buttons that i cant change and really need help!!!

i tried to change the project but in all projects are the same problems.

ask if u need more informations to know my mean

ok i have done this. just deinstall and install again