diff --git a/src/AddIn/AddIn.cs b/src/AddIn/AddIn.cs
index b0fcc3b..ad77247 100644
--- a/src/AddIn/AddIn.cs
+++ b/src/AddIn/AddIn.cs
@@ -31,6 +31,24 @@ namespace RehauSku
             IntelliSenseServer.Install();
             RegistryUtil.Initialize();
             Excel = (Application)ExcelDnaUtil.Application;
+            AddEvents();
+        }
+
+        private void AddEvents()
+        {
+            Excel.SheetSelectionChange += RefreshExportButton;
+            Excel.SheetActivate += RefreshConvertButton;
+            Excel.WorkbookActivate += RefreshConvertButton;
+        }
+
+        private void RefreshConvertButton(object sh)
+        {
+            Interface.RibbonController.RefreshControl("convertPrice");
+        }
+
+        private void RefreshExportButton(object sh, Range target)
+        {
+            Interface.RibbonController.RefreshControl("exportToPrice");
         }
 
         public void AutoClose()
diff --git a/src/Assistant/SkuExtensions.cs b/src/AddIn/SkuExtensions.cs
similarity index 88%
rename from src/Assistant/SkuExtensions.cs
rename to src/AddIn/SkuExtensions.cs
index e39807b..c7fe2bc 100644
--- a/src/Assistant/SkuExtensions.cs
+++ b/src/AddIn/SkuExtensions.cs
@@ -1,6 +1,6 @@
 using System.Text.RegularExpressions;
 
-namespace RehauSku.Assistant
+namespace RehauSku
 {
     static class SkuExtensions
     {
diff --git a/src/AddIn/WorksheetExtensions.cs b/src/AddIn/WorksheetExtensions.cs
new file mode 100644
index 0000000..51ce13a
--- /dev/null
+++ b/src/AddIn/WorksheetExtensions.cs
@@ -0,0 +1,32 @@
+using Microsoft.Office.Interop.Excel;
+using System.Linq;
+
+namespace RehauSku
+{
+    public static class WorksheetExtensions
+    {
+        private static string amountHeader = "Кол-во";
+        private static string skuHeader = "Актуальный материал";
+        private static string groupHeader = "Программа";
+        private static string nameHeader = "Наименование";
+
+        public static bool IsRehauSource(this Worksheet worksheet)
+        {
+            Range amountCell;
+            Range skuCell;
+            Range groupCell;
+            Range nameCell;
+
+            Range[] cells = new[]
+            {
+                amountCell = worksheet.Cells.Find(amountHeader),
+                skuCell = worksheet.Cells.Find(skuHeader),
+                groupCell = worksheet.Cells.Find(groupHeader),
+                nameCell = worksheet.Cells.Find(nameHeader)
+            };
+
+            return cells.All(x => x != null);
+        }
+    }
+}
+
diff --git a/src/Interface/RibbonController.cs b/src/Interface/RibbonController.cs
index 822fe98..7d70391 100644
--- a/src/Interface/RibbonController.cs
+++ b/src/Interface/RibbonController.cs
@@ -1,4 +1,5 @@
 using ExcelDna.Integration.CustomUI;
+using Microsoft.Office.Interop.Excel;
 using RehauSku.PriceListTools;
 using System;
 using System.Runtime.InteropServices;
@@ -9,16 +10,18 @@ namespace RehauSku.Interface
     [ComVisible(true)]
     public class RibbonController : ExcelRibbon
     {
+        private static IRibbonUI ribbonUi;
+
         public override string GetCustomUI(string RibbonID)
         {
             return @"
-      <customUI xmlns='http://schemas.microsoft.com/office/2006/01/customui'>
+      <customUI onLoad='RibbonLoad' xmlns='http://schemas.microsoft.com/office/2006/01/customui'>
       <ribbon>
         <tabs>
           <tab id='rau' label='REHAU'>
             <group id='priceList' label='Прайс-лист'>
-                <button id='exportToPrice' label='Экспорт в новый файл' size='normal' imageMso='PivotExportToExcel' onAction='OnExportPressed'/> 
-                <button id='convertPrice' label='Актуализировать' size='normal' imageMso='FileUpdate' onAction='OnConvertPressed'/> 
+                <button id='exportToPrice' getEnabled='GetExportEnabled' label='Экспорт в новый файл' size='normal' imageMso='PivotExportToExcel' onAction='OnExportPressed'/> 
+                <button id='convertPrice' getEnabled='GetConvertEnabled' label='Актуализировать' size='normal' imageMso='FileUpdate' onAction='OnConvertPressed'/> 
                 <menu id='conjoinMenu' label='Объединить' imageMso='Copy'>
                     <button id='mergeFiles' label='Сложить' onAction='OnMergePressed'/>    
                     <button id='combineFiles' label='По колонкам' onAction='OnCombinePressed'/>   
@@ -33,6 +36,19 @@ namespace RehauSku.Interface
     </customUI>";
         }
 
+        public void RibbonLoad(IRibbonUI sender)
+        {
+            ribbonUi = sender;
+        }
+
+        public static void RefreshControl(string id)
+        {
+            if (ribbonUi != null)
+            {
+                ribbonUi.InvalidateControl(id);
+            }
+        }
+
         public void OnMergePressed(IRibbonControl control)
         {
             MergeTool mergeTool = new MergeTool();
@@ -59,6 +75,19 @@ namespace RehauSku.Interface
             }
         }
 
+        public bool GetConvertEnabled(IRibbonControl control)
+        {
+            if (AddIn.Excel.ActiveWorkbook == null)
+                return false;
+
+            else
+            {
+                Worksheet worksheet = AddIn.Excel.ActiveWorkbook.ActiveSheet;
+                return worksheet.IsRehauSource();
+            }
+        }
+
+
         public void OnExportPressed(IRibbonControl control)
         {
             try
@@ -79,6 +108,18 @@ namespace RehauSku.Interface
             }
         }
 
+        public bool GetExportEnabled(IRibbonControl control)
+        {
+            if (AddIn.Excel.ActiveWorkbook == null)
+                return false;
+
+            else
+            {
+                Range selection = AddIn.Excel.Selection;
+                return selection.Columns.Count == 2;
+            }
+        }
+
         public void OnConvertPressed(IRibbonControl control)
         {
             ConvertTool convertTool = new ConvertTool();
diff --git a/src/PriceListTools/ExportTool.cs b/src/PriceListTools/ExportTool.cs
index b36bf09..82fd86a 100644
--- a/src/PriceListTools/ExportTool.cs
+++ b/src/PriceListTools/ExportTool.cs
@@ -1,5 +1,4 @@
 using Microsoft.Office.Interop.Excel;
-using RehauSku.Assistant;
 using System;
 using System.Collections.Generic;
 using RehauSku.Interface;
diff --git a/src/PriceListTools/SourcePriceList.cs b/src/PriceListTools/SourcePriceList.cs
index ec9025d..01637f8 100644
--- a/src/PriceListTools/SourcePriceList.cs
+++ b/src/PriceListTools/SourcePriceList.cs
@@ -4,10 +4,10 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using RehauSku.Interface;
-using RehauSku.Assistant;
 
 namespace RehauSku.PriceListTools
 {
+
     internal class SourcePriceList : AbstractPriceList
     {
         public Dictionary<Position, double> PositionAmount { get; private set; }
@@ -22,7 +22,7 @@ namespace RehauSku.PriceListTools
             Sheet = workbook.ActiveSheet;
             Name = workbook.Name;
 
-            Range[] cells = new []
+            Range[] cells = new[]
             {
                 amountCell = Sheet.Cells.Find(amountHeader),
                 skuCell = Sheet.Cells.Find(skuHeader),
@@ -30,7 +30,7 @@ namespace RehauSku.PriceListTools
                 nameCell = Sheet.Cells.Find(nameHeader)
             };
 
-            if (cells.Any(x => x == null)) 
+            if (cells.Any(x => x == null))
             {
                 throw new ArgumentException($"Файл {Name} не распознан");
             }
diff --git a/src/RehauSku.Assist.csproj b/src/RehauSku.Assist.csproj
index f4b4695..9ffc4c4 100644
--- a/src/RehauSku.Assist.csproj
+++ b/src/RehauSku.Assist.csproj
@@ -121,7 +121,7 @@
     <Compile Include="AddIn\MemoryCacheUtil.cs" />
     <Compile Include="Assistant\ParseUtil.cs" />
     <Compile Include="Assistant\RequestModifier.cs" />
-    <Compile Include="Assistant\SkuExtensions.cs" />
+    <Compile Include="AddIn\SkuExtensions.cs" />
     <Compile Include="Interface\ProgressBar.cs" />
     <Compile Include="Interface\ResultBar.cs" />
     <Compile Include="PriceListTools\CombineTool.cs" />
@@ -139,6 +139,7 @@
     <Compile Include="AddIn\AddIn.cs" />
     <Compile Include="Assistant\IProduct.cs" />
     <Compile Include="AddIn\Functions.cs" />
+    <Compile Include="AddIn\WorksheetExtensions.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Assistant\SkuAssist.cs" />
   </ItemGroup>