It looks as though your installation for Universal Email has become corrupted or may have been like that from the start. I think you should try deleting or renaming your configuration folder to have Dreamweaver recreate it. This will clear the extensions you currently have installed and allow you to re-install them. When you install again make sure to select 'yes to all' when asked about overwriting existing files. Here is a link to instructions on clearing the config folder:
showpost.php?p=12293&postcount=2