Many thanks for your quick answer. I restored the backup to version 4.3 and then, I desactivating all pluggings and started to install WPress 4.4. again. Everything it´s ok now. So, maybe it has been a bug of the installation of WPress.
I would like to thank you for all your work, this theme is very the good, complete, useful and I am very happy of my choice.
¡Have a nice day!