Absolutely! All previous kstars versions are always available hosted on the indi website going back for a decent number of Versions.

www.indilib.org/jdownloads/kstars/kstars-3.7.0.dmg

You can just edit the numbers at the end of this download link and you should get the older versions. I am not sure if Jasem has a list somewhere. I do have a bunch of the dmg files that I built over the years archived if one or more are no longer hosted there, but the last time I checked, a bunch were there.

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