Deleting the links in /home/tc, copying them from the non-writable location to /home/tc, then editing them does work after a reboot.
It is a convoluted way to obtain a set of configuration files.
As the WM works perfectly with normal editable files, the need for non-editable links escapes me. It would seem to be just as easy to produce them in editable form in the user home directory. In fact one of the files, .jwmrc-ondemand is editable by default while the remaining four are not.