Changes in master style are not reflected in the preview

Hi, I have a Rapidweaver 6.3.6 and new theme called “Escape” from Michael David Design. When i make some changes in a master style these changes are not reflected in the preview. For example changing position of sidebar or font of a text.The only thing that works is changing a color of backgrounds. I tried a copy theme, even reinstall rapidweaver, but nothing helps. Other themes work fine but i need this one. Does anyone have any idea? Thanks for the reply.

(Computer: Mac Pro 2009, OS X Yosemite)