You do not need the old version of the plugin. Go to Theme Options > re-save settings, clear cache, and check the site then.
If this doesn’t help, provide us with temporary access, so we can take a closer look and help you.
Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
If you do not know how to create FTP contact with your hosting provider, they will help you.
