I run WACUP Build 1.99.32.21640 32 bit on Windows 10. It uses Winamp Modern skin.
While playing music (also when paused) it acts normally, but when music is stopped, it begins restarting whole user interface.
Whatever I am doing, even if I am in About dialog, it restarts and closes dialog. Restarts come every few seconds. After restart is shows up on top of all other Windows on desktop like it is set to be always on top, which is not - Always on top option is turned off.
Recreation of graphical interface is not fast. It is clearly visible how it shuts down then after second or two it is created again.