Action to Replace Tags

Trying to create an action to replace tags in multiple mp3 files. The "replace with regular expression" won't let me add a star in the "Regular expression" field (screenshot below). I want to replace the whole tag with the new value. How do I specify that the whole field should be replaced?

Looked at the documentation but couldn't figure out why the star isn't working. Probably missing something very basic as this seems like something that should be simple.

For example: "Existing Album Name" > "My New Name"

screenshot

To set a new value for a field, use an action of the type "Format value" for that field.

If you really want to replace with regular expressions, please see the help on regular expressions. The expression that you used did not comply with the syntax rules.

Format Value works great, thanks ohrenkino!