To start over with Aerochive.
Note: This will delete your existing backup files.
You will need to delete two files.
The ~ means your user directory, the name with the house icon, that is in every finder window.
1) Delete: ~/Library/Application Support/Aerochive/Aerochive.xml
2) Delete: ~/Library/Preferences/com.softwareops.Aerochive.plist
3) Remove key chain entries.
a) Using Spotlight, in the upper right corner of your screen, search for Keychain Access. It is an application
b) Launch Keychain Access. When it starts search for com.softwareops
You should find between 3 and 5 entries. Delete all the entries that start with com.softwareops.myeyesonly
That should give you a clean start.
Now launch Aerochive again and it should not state that you have an expired trial version. It will be like starting over.
4) Under the Aerochive Menu, select the "Veiw Registration Menu..." That will show you a dialog where you can enter your Aerochive serial number: "