Problems with the colors of my codes. They're just white on a black background or vise versa

I have always used Dreamweaver to code html, css and js. One feature I've always liked is the color formats of the source code (ie. blue for functions, green for numbers, purple for variable names, orange for strings etc). However, since this recent update, I'm having some problems with the colors of the code. When I open Dreamweaver and go to a file that I was working on, all the code is just white on a black format or if I change the background color, black on a white background. The only solution I've found to this problem is that I have to close Dreamweaver and start it up again, and on the third or fourth attempt, the normal color formats (ie. blue for functions, green for numbers, purple for variable names, orange for strings etc). return. Are any other people having this problem and are there any solutions so that I don't have to keep closing and opening Dreamweaver, till I get my normal color formats back.

Thanks in advance, Gary