I would like to udate to the latest version, but i have several modifications made, for example my logo, header width, copyright in another language, some altering on the language files ect... wil the update overwright this things, and if so, how can i prevent this?

thanks..

?? if u change copyright, don´t have suport here

I did not change the copyright i translated it, as english is not my or my visitors native language. It still says the same and the link is intact...

The license should remain as is, without translations. Anyway backup files and check if there are modifications.