This version contains lots of smaller improvements and bug fixes.
New features
Message rules word lists are sorted alphabetically when added, automatically eliminate any duplicates and also allow multi-selection (for faster Remove)
Editing of already inserted Message Rules Conditions
Message rule Account condition uses default account as a starting selection
Message source editor does word wrapping instead of using long lines
Message rules windows can be resized
Email validator level can be adjusted in the new Advanced options
Folder delete is no longer permanent operation and can be reversed as deleted folder is only moved to Deleted Items folder
Nested folders are also deleted after deleting top-level folder
Empty Deleted Items option now also permanently removes all subfolders inside Deleted Items folder
More icon improvements
Bug fixes
Undo/Cut/Copy/Paste/Select All toolbar buttons and Edit menu items were greyed in message editor
Removed byte order mark from some messages causing improper display
Zero length words in message rules are no longer allowed
Message rule list Move Up/Move Down buttons did not select the item which was moved
Message rules were not checked for invalid/deleted folders - such rules now show meaningful error and they can be opened to change the folder to an existing one
Emails with frame/iframe content opened a new browser window - it is now blocked
Account ID was shown instead of the name in the message rules condition list
Switching between Edit/Source/Preview tabs in message editor caused message to be shown or sent incorrectly under specific circumstances
Multiple clicks on message compose Send button could generate 2 (or more) messages in Outbox
Message sending/saving is no longer allowed while the user is still editing source (user must switch back to Edit tab)
Visual HTML editing features were not disabled while source editing was active
Copy/Select All were not working in Preview tab of message editor
Message editor fonts are more consistent when replying to other messages (keeping selected font type/size)
After copy-pasting plain text in message editor, line breaks were not preserved as in original text file
Reply All no longer includes user's own emails as a recipient in To/Cc list
Change of focus to folders in main window after opening message in a new window no longer happens