Thanks for your quick reply for the matter of updating of Xaplla theme. I forgot not rewrinitng sites folder. I succeeded to update to 7.41.
By the way, I updated Worldwide theme also to 7.41. I didn't make any error but I have a problem after updating all the modules recommended by Drupal admin.
After updating, the anchors(#contact) are not moving to the right point.
For testing purpose, I made a dummy site and updated all the modules. http://medika.ipdisk.co.kr/allthathotel2
Yes, I could not to choose to update. Is it best way not to update?
FYI, the below is Status.