If it is automatically re-enabling the plugin then it is still enabled in the DLP policy. You can disable the plugin in your Windows client configuration policy in EPO:
Note: Disabling the plugin will remove DLPe's ability to protect Outlook emails. If you are not using any email protection rules then there should be no impact.
My policy has different options available since it is a full content protection license. From your screenshot it looks like you currently have a device control only license applied. Do you have the full content protection license available? Applying the full license should give you access to the other options.
If not, were you by chance using a full content protection evaluation license at some point prior when DLPe was deployed to this system?
This is what is listed in the Master Repository. I don't believe it was an eval license but it doesn't appear to be licensed like some of the other modules. I will check with my organization to find out exactly what we have available. I'll update this thread as soon as I hear from back from my own folks.
Thank you once again!