They are in different computers. I did the changes in my virtual machine that it is in my pc. I put this change in the production server (the same files) and, there, the visual changes don't appear in web-site, you see the old xml. But if you download the base.xml file, there are the changes. I don't know how refresh this xml. I restarted the service but nothing happen... and in virtual machine, the restart worked...

Restarting the server does not reload the xml. the server simply reloads the python code. You have to upgrade or reinstall the module to load changes in the xml. Sorry for responding late.

Thank you kaynis for your answer, but in this case, the module that I modified it's web. How can I upgrade this one for seeing the changes in old databases?

Reload/reinstall base module

But for doing this, I have to login in some databases, no?

yes you have to login