Uninstalled CRM 2011 Beta Outlook Client prevents installation of CRM 4 Outlook Client

Error you get: Action Microsoft.Crm.Config.Client.InstallPstAction failed. LaunchOutlookInstallerProcess failed. Error you have in the log:
14:35:57| Info| Could not remove registry subkey HKEY_CURRENT_USERSOFTWAREMicrosoftMSCRMClientAllowList. Cannot delete a subkey tree because the subkey does not exist. 14:35:57| Info| Executing Uninstall action: Microsoft.Crm.Config.Client.DeleteUserApplicationFilesAction 14:35:57| Info| Executing Uninstall action: Microsoft.Crm.Config.Client.DeactivateAddin 14:35:57|Verbose| Method exit: Microsoft.Crm.Config.Client.ClientConfig.Reset| System.Collections.Hashtable 14:35:57|Verbose| Method entry: Microsoft.Crm.Config.Client.ClientConfig.SetConfigurationControlRegistryValues 14:35:57|Verbose| Method exit: Microsoft.Crm.Config.Client.ClientConfig.SetConfigurationControlRegistryValues 14:35:57|Verbose| Method exit: Microsoft.Crm.Config.Client.ClientConfig.ConfigurationExceptionHandler 14:35:57|Verbose| Method exit: Microsoft.Crm.Config.Client.ClientConfig.Install| System.Collections.Hashtable 14:35:57| Error| Configuration exception.System.Exception: Action Microsoft.Crm.Config.Client.InstallPstAction failed. —> System.Runtime.InteropServices.COMException (0xC0000005): LaunchOutlookInstallerProcess failed. at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) at Microsoft.Crm.Config.Client.InstallPstAction.Do(IDictionary parameters) at Microsoft.Crm.Setup.Common.Action.ExecuteAction(Action action, IDictionary parameters, Boolean undo)
Solution:
Uninstall V4
Manually delete the crmforoutlookinstaller.exe from Microsoft Dynamics CRM Folder under Program Files
Install and configure V4 again.
Link to the discussion about the problem: Outlook Client Install: Uninstalled CRM 2011 Beta Outlook Client and now can’t configure CRM 4 Outlook Client
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