You can remove tags from several files at once right from the Files page. This is a useful feature if the wrong tag was accidentally added, or if you are trying to delete a tag from your Preferences.
Steps to Remove Tags in Bulk
Go to the Files page from the left-hand menu
Select the checkbox next to each file you want to update
Scroll to the bottom and select the tag icon
Choose Add and Remove Tags
In the Tags field, select the tag(s) you want to remove
To remove more tags, select the field again and choose others
Select Remove Tag