User removed eWay-CRM Add-in from Outlook and it is now not visible in the list even after reinstallation

Description

This is a very specific situation that occurs when a user opens Outlook as an administrator. Only an administrator can remove the add-in. As shown in the image below, this is not possible when Outlook is opened in the standard way.

If the user removes the add-in while running Outlook as an administrator, Outlook does not delete the add-in registration record, but instead creates a second masking key. For this reason, reinstallation does not help.

The registry keys for 32-bit are located here:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Office\Outlook\AddIns\eWayAddin.Connect
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Office\Outlook\AddIns\eWayOutlookAddIn

For 64-bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Microsoft\Office\Outlook\AddIns\eWayAddin.Connect
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Microsoft\Office\Outlook\AddIns\eWayOutlookAddIn

They look something like this:

Version

All versions of eWay-CRM

Difficulty

High

Resolution

The solution is to delete the keys from the Windows Registry.