That's message is not on the new version, so you must have logged in to the old version on MailWasher Pro. In MailWasher Pro - Logout out of it, then login again and select version 2.0 of the mobile version instead of 1.4
There's a later version here which has a fix for sync'ing IMAP email accounts
http://cdn.firetrust.com/downloads/mail ... 112014.exe
MailWasher Mobile for IOS (iPhone, iPod touch, iPad), Android devices and Windows Phone 8.