The Pro alignment software is still under development, but there are the normal methods for working with a Passthrough slot available now. You don’t have to wait to use it.
(Good writeup on it here: Passthrough Alignment Tutorial with Manual Indexing)
Even easier if you happen to have Snapmarks enabled on your machine? (It’s still in Beta.)
In any case, a puzzle should be fairly easy to split and work in parts. If you need some help understanding how to get that started in the interim, just ask. There’s no reason you can’t use the Passthrough now. (Been using mine for almost a year and a half. Works great for large projects.)