Here’s another one which is free to use & open source:
It’s browser based and does the whole process from calibration, to stitching of multipage PDF files, to the actual projection of the pattern.
For further advice, guides, & other resources there’s a Facebook group Projectors for Sewing; or if you’d rather steer clear of Facebook there’s also https://sashasewist.info, and/or https://projectorsewing.com, who both have lots of info.
I’ve just picked up a lightly used Casio UST that has an ultra longlife (≥20k hours!) hybrid Laser/LED light source (so no expensive bulb changes needed every 2-3k hours). I just need to get/make a suitable floor/table mount for it & I’m all set.