Hey I installed correctly houdini 11.0.733, I inserted the keys but when I open it, it doesn't show me icon buttuns but only grey squares and words. How can I fix it? Can you help me? I have a MacBook Pro 13"

this may help:
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=20279 [sidefx.com]

thank you very much… I've seen an other post before your reply and it says that I must delete houdini in preferences folder (in Library). Now it works