Frozen graphics

All my graphics got frozen while I was digitizing a design.  All graphic elements are not hidden and are  seen on the color-object list but not on the working screen. Selecting or pressing the graphic design element on the color-object list does nothing (black screen pic).

I have closed the program and restarted it, opened a new design screen, imported graphic s in .jpeg format, traced it to bitmap in Corel< returned, returned to embroidery more - the graphic is frozen and none  of its element on the colot-object list is selectable. ( white screen pic).

In general, when working  with bigger designs or saving the work after  working for some time ( not after every click of the mouse), throws the program off and it closes on me unexpectedly.