I use the Astroberry version at present and am trying out AstroArch version. Is there a way to copy/migrate my settings from the 32bit to the 64bit versions?

The KStars and INDI settings are kept in a few place you could try copying over. Look in:

These two files for KStars:
~/.config/kstarsrc
~/.local/share/kstars/userdb.sqlite

All the files in this directory for INDI
~/.indi

If you copy those things over to your new installation, you'll likely have your old settings.
(Make sure you backup whatever you overwrite, in case of issues.)
Note that if you're upgrading from an old version to a newer version, you may have to do more
setup--e.g. if you go from "pre optical train" to a version with optical trains, you'll need to set up the optical trains.

In addition, there are a lot of other things kept in ~/.local/share/kstars
you could re-install (e.g. catalogs, terrain files, etc).

Then there's the astrometry files you could re-install.

Hy

Any idea if there is a script available to make a copy. This would help take backups as well.