The toolbar layout has been messed up.
You may reset the toolbar layout to make it back to the factory condition. Please follow the procedure below:
1) close ES e4
2) in File Explorer, go to the folder below:
C:\Program Files (x86)\Wilcom\EmbroideryStudio_e4.0\BIN
3) double click on this file:
Note: it will reset the toolbar layout of ES to let it back to the factory condition.