Removing/Renaming Tags from Windows App

This seems very easy to to in iOS. However, I was wondering if there was a way to do this in the new Windows 8 app.

I have a few hundred items that are tagged with the same tag. I want to remove this tag from all of my items. Is there a way to "delete" this tag or remove it from all of the items rather than editing each item individually?

Additionally, can I rename a tag and have it affect all items? I have a number of items with a tag of "Security Key #1" . I want to rename it to "John's Blue Security Key" is this possible without editing ever item?

1Password Version: 8.4.1
Extension Version: Not Provided
OS Version: Windows 10