* Adding pause button (and to be able to change some sending settings while paused)
A 'Pause' button will be available in v7. However you will not be able to modify settings. To modify settings you have to completely stop the delivery.
* Importer of addresses to check for every address in the text file and not to be only if they are separated with ; , | or TAB
Not sure I understand this one.
* Open finished mail from history mail (all the settings)
Not sure I understand this one either.
* Unsubscribe (like Bounde mail program but for unsubscribe. Lets say the user to chose ether to remove or uncheck the address)
That will be available in next v7 thru MLM for both remote and local lists.
* When opening in window that is "untitled" not to open saved document in new window.
Do you mean to close the 'untitled' document if any?