If you're upgrading from the old MailWasher Pro it will mostly be a seamless process, but you'll want to take a note of the following:

 

1.MailWasher Pro will not run on Windows 98, Me or 2000. It will only run on Windows XP, Vista, 7, 8 and above.
2.All your contacts, most settings and email account information will be imported.
3.Your existing MailWasher Pro registration key will not work in later versions of MailWasher Pro after 6.54
4.Your filters will not be imported in to MailWasher Pro. Unfortunately they will be required to be re-written due to many changes in the way filters are evaluated and setup.
5.'Process Mail' is now 'Wash Mail'
6.Spam tools now use a weighted approach to recognizing spam, so instead of just one spam tool making the decision about whether an email is spam or not, all spam tools are evaluated to ensure a more accurate evaluation.
7.User files are now held in a database (as opposed to text files and the Registry) with other settings such as language files for translations held as XML files, all accessible via Help>>User Files or Help>>Common Files.
8.Your old MailWasher Pro 500 digit license key will not work with the new MailWasher Pro as it has a 12 digit license key. You will need to purchase a new license key for MailWasher Pro after 6.54.