Ext.define('Ext.ux.LiveSearchGridPanel', {
    extend: 'Ext.grid.Panel',
    requires: [
        'Ext.toolbar.TextItem',
        'Ext.form.field.Text',
        'Ext.ux.statusbar.StatusBar',
	//"Ext.ux.exporter.Button"
    ],

initComponent: function() {
        var me = this;
        me.tbar = ['Search',{
                 xtype: 'textfield',
                 name: 'searchField',
		 hideLabel: true,
                 width: 200,
                 listeners: {
                     change: {
                         fn: me.onTextFieldChange,
                         scope: this,
                         buffer: 100
                     }
                 }
            },{.......},{
                xtype: "exporterbutton",
                 text:"Export"  
            }

Ext.require([
.........
	'Ext.ux.LiveSearchGridPanel',
	"Ext.ux.exporter.Button"
]);

var grid = Ext.create('Ext.ux.LiveSearchGridPanel',
	{   
...........
        store: store,
        columns: [.......],
dockedItems: [{
			xtype: "toolbar",
			dock: "top",
			items: [{
			xtype: "exporterbutton",
			//xtype: "button",
			width:50,
			text:'Export'			
				}]
			}]

Ext.define("Ext.ux.exporter.Button", {
    extend: "Ext.Component",
    alias: "widget.exporterbutton",
    html: '<p></p>',
    config: {
        swfPath: 'downloadify.swf',
        downloadImage: 'download.png',
        width: 62,
        height: 22,
        downloadName: "download"
    },

    config: {
        swfPath: 'downloadify.swf',
        text:"Export",
        downloadImage: 'excel.png',
        width: 70,
        height: 25,
        downloadName: "Export"
    },

Ext.define("Ext.ux.exporter.Button", {
    extend: "Ext.Component",
    alias: "widget.exporterbutton",
    html: '<p></p>',
    config: {
        swfPath: 'downloadify.swf',
		//downloadImage: 'download.png',
		downloadText: 'Export',  //исправляю просто на текст - не отображается вообще.
        width: 120,
        height: 25,
        //downloadName: "Download"
        downloadName: "Inventory"   // не применяется, всё равно используется download
    },  
и
setDownloadify: function(config) {
       ......
            transparent: false,
            swf: this.getSwfPath(),
            //downloadImage: this.getDownloadImage(),
		    downloadText: this.getDownloadText(),
            width: this.getWidth(),
            height: this.getHeight(),
            transparent: true,
            append: false
        });

config: {
        swfPath: 'downloadify.swf',
		//downloadImage: 'download.png',
		downloadText: 'Export',  //исправляю просто на текст - не отображается вообще.
        width: 120,
        height: 25,
        //downloadName: "Download"
..........
    },  
и
setDownloadify: function(config) {
       ......
            swf: this.getSwfPath(),
            //downloadImage: this.getDownloadImage(),
		    downloadText: this.getDownloadText(),
..............
        });

if(f.options.downloadText)a.downloadText=f.options.downloadText;

html: 'FIO'+' '+get...('FIO')   // в результате FIO Дудкин В.П.

//Ext.ux.grid.Printer.printAutomatically = false;
//Ext.ux.grid.Printer.print(grid);

Ext.ux.win.Printer.printAutomatically = false;
Ext.ux.win.Printer.print(win);
или
Ext.ux.win.html.Printer.printAutomatically = false;
Ext.ux.win.html.Printer.print();