I've gathered together all of the tcmdupdate.aiu files for releases of Take Command from version 20 to current for my personal Take Command Help File, as tcmdupdate.aiu contains more detailed information of what changes were made to minor versions of Take Command.

I cannot find any tcmdupdate.aiu before version 20, although I did find tcmdupdate.aiu for TCC/LE 13.0 and 14.0

Am I correct that tcmdupdate.aiu only exists for version 20 to current?