While trying to open the lock file information to see who was in the database I accidently changed the icon to always open with notepad. Now all my lock files show the notepad icon instead of the Access Lock File. It still shows as a LACCDB file. Is there a way to change that back? What would the default opens with be so that the lock file icon shows again? I'm using office 365. Thank you for any help you can offer. I wish there was an easy way to just see what current and last users of the database are.