Programm Init after Start: Wrong Button Graphics

Sometimes (most often the next day after new turning on the PC) the Programm initialises the button-graphics wrong. I quit Dorico and start again: Everything is fine!?
I am using AMD Radeon HD 5450, Driver is uptodate on Windows 10 64Bit.

Please see the FAQ thread, in particular the question “The icons in Dorico’s user interface looks all stretched and weird. What do I do?”