Actualy, ARIA expect to open "/Library/Preference/com.Plogue.Aria.plist" , when in fact the file is named com.plogue.aria.plist (in lower case)

Workaround to fix this issue:

- Close all aria stuff

- copy AND Rename "com.plogue.aria.plist" to "com.Plogue.Aria.plist"

- You should now have both files on your directory and everything should now work properly.

An update to the ARIA engine to look for the lowercase version should soon be released.