I never used such but instead just rotated the entire picture and then cropped it square. I guess that's what this feature did?
I use Adobe PhotoDeluxe Home 4.0 for my editing but used an old beta version of Photoshop 6.0 and am currently using a trial version of Photoshop Elements 2.0 for correcting non-level horizons in landscapes. Is there a simple and less expensive way to do this correction? I removed the beta version from my computer lately because it is not easy to use, was not very stable, and was a pirated version I bought years ago when Ubid.com was a pretty loose organization.