Hi valexvo (alex)

How can I enable .net 4.0 in azin project?

Enable
Components\".Net FrameWork S" Plugin,
I hope this helps. ????
Edit: If not another solution also available

How can I make my usb with changes to be permanent?

After build
Try
Write Media\"Rufus" Plugin
Let's see how it goes.
Edit: There are also other \Write Media\ Plugins, let's first see your Rufus result.