Hi folks,
I would like to know how to disable all tooltips.

I've tried using the instructions below, however, works only for tooltips created starting from QTipCfg:
Ext.tip.QuickTipManager.disable();
See the example below:
<!DOCTYPE html>
<html>
<head runat="server">
    <title></title>
    <script type="text/javascript">
        Ext.tip.QuickTipManager.disable();
    </script>
</head>
<body>
     <ext:ResourceManager ID="ResourceManager1" runat="server" />
     <ext:Button Text="Button With ToolTip" runat="server">
        <ToolTips>
            <ext:ToolTip Anchor="top" Html="ToolTip" runat="server" />
        </ToolTips>
     </ext:Button>
     <ext:Button Text="Button With QTipCfg" runat="server">
        <QTipCfg Text="QTipCfg" />
     </ext:Button>
</body>
</html>