the 4.1 update is not working properly

it brings out the color in the code enclosed in [as] … [/ as]

You mean it highlights the code between [as] & [/as] tags? It is supposed to do that, even v3.5 highlights code between [as] & [/as] tags.

and letter of the code is very tiny

That seems like a CSS issue. If you can give me the URL to your blog where you’re having this issue maybe I can suggest the CSS you can use.

On a side note, if you wish to prevent code from being highlighted in [as] & [/as] tags then you can escape those tags like:

[[as]
//some code here
[/as]]

Notice the extra [ before the starting tag and extra ] after the closing tag. This way you can prevent the code in this block from being parsed by the plugin.

i’m sorry, i’m using the google translator but not translate well, the problem of the new version of plugin is that not work and does not highlight the code with any languaje selected

does not work with any language
[as]
if(){ –> no highlights /not work
}
[/as]

[php]
if(){ –> no highlights /not work
}
[/php]
[js]
if(){ –> no highlights /not work
}
[/js]

etc..

Which version of WordPress are you using? And what is the version of PHP?