The loader is in:

Tcad1_4_42K.mnl

This file should be in:
C:\Tcad1_4_42k\Support\

In your case you would find it in:
F:\Tcad1_4_42k\Support\

Edit the code in line 21 by changing the drive letter C: to F: as follows:

(SETQ TCADPATH "F:/TCAD1_4_42K")

In other words, simply change the C to an F

This should start the loader, if not tell us what happened on the forum here and email me to tell me that you have a post that needs an answer. Good luck.

paul@spbrooks.com