thx for your quick answer.
i've to sites with yougrids. one with version 1.0.10 and the other with version 1.0.11. what's the best (an easiest way) for me to update to 1.0.13? on both sites i have added a new style, that i will keep.
Should i update step by step? if yes, where can i find version 1.0.12? or is it possible to do it with the files in 1.0.13?