Scrolling does not work

Suddenly disappeared scrolling pages open document (and text, and tables) and scrolling (roll the mouse and pressing the up and down arrows to the right of the document). In this central part of the window is constant, and only comes up to 3-4 up bottom lines following text (and as it disappears under the fixed central part), or falls on top 3-4 in the top ranks of the previous text (and as it disappears under the fixed central part ).
In this menu, all the labels have become black.
When you first start the program on the screen shows all the previous files. Icons also black.
It first appeared in version 4.4.2. Update to 4.4.5 - I get by. But the next day - all the same.
Clean CClean - one day I get by.
I updated to 5.0 - the same.
Help to fix the problem yourself.