Commented Issue: Unable to add or edit farm level properties in SP Manager 2013 [12704]

I have downloaded SharePoint Manager 2013 onto my virtual farm but it is not allowing me to edit properties on there. I'm using an account which has access to the DB and has farm level admin rights. However, Add and Remove buttons are disabled.
Comments: ** Comment from web user: azonicds2 **

I have the exact same issue. Need to delete some annoying Hashtag_0 fields on a sub site that's preventing me from saving the site as a template.

Very frustrating, as I can see them on SPM but the Remove button is greyed out..

Did you ever find a solution to this Kevmcdonk?

Thanks
Danny