Well it's released and you can find it here
Damn, this posts should be in the BlindWrite forum.
Can any moderator move this to there??
do you have to uninstall BlindWrite 4.5.3 or will 4.5.4 update the older version?
I always put it just over the older version.
But there are people that always first remove the older verion and then install the newer.
I never had problems with installing it over the older version (knock on wood).