Here is what I do.
When upgrading, I do not un-install the previous version.
From the v22 command prompt;
Note the location of the TCMD.INI file for v22. After I install v24, from the v24 command prompt;
Make a backup of the TCMD.INI from the newly installed v24.
Copy the v22 TCMD.INI to the v24 TCMD.INI
Now, if you have any problems between the two TCMD.INI files, you have a backup of the v24 TCMD.INI file to work with.
Note that v24 has TCEDIT;
Edit text, INI, and script files
TCEDIT [/C /EXIT /INI /START] filename ...
...which allows you to edit your TCMD.INI by using;