I have just created a tag for the programs in Gitlab with a version compatible for Free42 2.5.24 (or above):
I have just decided to remove the raw files since anyone can generate them from the text files.
On the other hand, have you succeeded running the DERIV program? I believe that maybe you forgot to set the ORDER of the derivative.
As example, I will reproduce here the operations to run it.
1) Create the FX
2) Run XEQ "DERIV"
3) When the program stops with the message "Select f(x) Program", type "FX" in the Alpha register
4) Press R/S
5) When the program stops with the message "Set Vars; Select Var", type the evaluation point (for instance 1) and the press in the soft menu X. Press again on X
6) In the DERIV menu:
7) type the derivative order that you would like to compute (for instance, 3 for third derivative) and press ORDER in the soft menu.
8) then press DERIV. The other options is to change the order of accuracy (which is automatically set to ORDER+2, when the ORDER is introduced.
That should be enough to get the result. I hope that this information helps you.