On the Events tab at the bottom there are two buttons "delete" and "purge all". I think they should be both called "delete*" or "purge*"
I assume this means the change the labels to "Delete" and "Purge"?
yes Interestingly for translations delete and purge translate both to the same term in German. So something more descriptive would be even better.
How about mirroring the Message Center window and have a "Delete" and "Delete All"? Then it follows an already set pattern.