@gioweb, what Denzel was saying is that there is not a User Interface in Customizr to change the font or look of the widgets. It’s not a bug. To change the look of a widget you will need to learn CSS and add the custom CSS.
To learn what CSS Selector or ID you need to change, you need to view the source of the page and locate that info. For this, I like FireFox. Look at Tools -> Web Developers -> Inspector. Then mouse over the widget and note the specific info/code. If you don’t know CSS yet, you’ll need to learn it. This finding just shows you what to put into the CSS.
I can start you off with how to change the headings of all the widgets. It’s not what you want but it’s all that I have done.
.widget-title {
font-size: .9 em;
}
but put your own desired size.