Hey @john.warren3,
As @blake noted, I just migrated the Balance History Trimmer into Tiller Labs. The version in the separate Tiller Utilities add-on will soon be deprecated and relies on the obsolete Index column to uniquely identify columns. We now use Account ID as the unique index.
Give the version in Tiller Labs a try and let me know if it works for you.
Thanks for your patience.
Randy
P.S. Thanks as always for helping out John, @blake.