VS 2017 does not opens .edmx files in proper visual designer

EF Database models (.edmx) files are not opening in special VS EF data model designer. Just standard XML editor is working. All happening in VS2017 at win 10 (64).

Here is the declaration of the EDMX file

This is the line where I have the issue

I have this problem "Severity Code Description Project File Line Suppression State Error Error 175: The ADO.NET provider with invariant name 'System.Data.SqlServerCe.4.0' is either not registered in the machine or application config file, or could not be loaded. See the inner exception for details. SmartStore.Web D:\Dev\HMZ\RC5.0\builds\SmartStoreNET-3.x\src\Presentation\SmartStore.Web\App_Data\EfCache\SmartStore.Data.SmartObjectContext.edmx 5552"

most of the solutions founded on the web won't work

Please, people, help me with this. So terrible, experience. I'm trying to solve this problem 3-4 days

I tried most of those answers I could found over the web: like updating/re-installing the SQL Compact, editing web.config provider factories, and etc.

Web Config (MVC 5)

 <DbProviderFactories>
    <remove invariant="System.Data.SqlServerCe.4.0" />
    <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
    <remove invariant="System.Data.SQLite" />
    <add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite, Version=1.0.111.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
  </DbProviderFactories>
  <!-- Add the attribute 'codeConfigurationType' to the 'entityFramework' root element to overwrite the global DbConfiguration -->
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="System.Data.SqlServerCe.4.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
      <provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" />
    </providers>
  </entityFramework>