Windows decoration crash problem in Kubuntu velvet (15.04)
 

Hello, I have a problem with new Kubuntu velvet, everything was perfect till i downloaded normally some decorations to choose one of them , when i choose " dark translucent" the windows decoration crashes and become unable even to restore default decoration, any help? this decoration is heavy and slowing my laptop.

some picture:

http://i.imgur.com/yEVsRSV.jpg

http://i.imgur.com/SOIZGOz.jpg

Kubuntu 15.04 is the first distro that uses KDE5 by default. Is it possible that the decoration is older, made for KDE4?