The requirement for installation of the DSW is that there is either VS2008 SP1 or VS2010 installed. But if you have VS2010 installed, this requirement is satisfied obviously.
The problem that you have could be an installer upgrade issue. It is possible that some components are not installed correctly when upgrading from an old version of OpenAccess without uninstalling it first.
On the machine where you do not see the DSW, after uninstalling OpenAccess, did you remove the product folder (probably C:\Program Files\Telerik\OpenAccess ORM). It is recommended that you do that in order to ensure that you do a clean install of OpenAccess.
If this does not help, we will need you to check the following:
1. In the Visual Studio Add-in Manager (Tools > Add-in Manager) do you see the "Telerik OpenAccess" and "Telerik OpenAccess DSW" add-ins installed and enabled?
2. while having a solution open with a project that contains an .rlinq file, do you see a "Data Services Wizard" menu item in the Telerik menu in Visual Studio and in the context menu that shows when you righ-click on an .rlinq file in the Solution explorer
3. in the product folder, is there a dsw\IDEIntegrations\Addins
(probably C:\Program Files\Telerik\OpenAccess ORM\dsw\IDEIntegrations\Addins) and are there .AddIn files in there?
4. in the registry is there a key "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\10.0\AutomationOptions\LookInFolders" and does it have a value pointing to dsw Addins folder
(C:\Program Files\Telerik\OpenAccess ORM\dsw\IDEIntegrations\Addins)?
the Telerik team
Q1’11 SP1 of Telerik OpenAccess is available for download
; also available is the Q2'11 Roadmap
for Telerik OpenAccess ORM.