I need to install the latest version of Nintex Workflows. But it tells me that the application is already started. I have since uninstalled Nintex workflows following instructions downloaded from your site. Now when I do a Get_SPFeatures in PowerShell it shows me 7 Nintex features, but these are not visible in central administration and if I try to delete them using PowerShell it tells me they are not found.
See attached PowerShell screenshot.
