The only software that can reliably work with PageMaker documents is PageMaker itself, but it has been discontinued years ago, which does not make it easy. Although you can still find and download old installation packages of some version of PageMaker, it might not always be possible to resave documents the way you want. It is actually best to use exchange format and transfer these documents to modern software instead, but in theory pm3 to alb5 conversion should still be doable.
Updated: August 21, 2023