Per is correct.
Panoweaver is designed for equirectangular projection you "could" expand your canvas of your panorama to equirectangular dimensions (half as tall as wide) and then limit the tilt angle and that way you could use PTViewer to display your panorama's.
3.01 is the current version. You will not get a different stitching results between the trial version and the registered version. If you did get different results somehow it has to be the settings you entered of the camera position changed between the first attempt and the current one.
Regards, Smooth
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