Posted in bugs, since I suggest that it is one.
In some future version, could the TC config files in /opt be changed to visible (non-dot) files? Perhaps put into a sensible directory like /opt/tcconfig or /usr/local/etc/tc? I realize this is a small change which affects many places in the core and some extensions as well, but (1) it tripped me up the first time I went looking for .filetool.lst and friends. I can't be the only one this has happened to. (2) it's uncommon (maybe even unknown) in Linux to have system wide config files hidden as dot-files. If you forget exactly where they are and you just go hunting with cd and ls, you won't find them, unless you know that they're hidden.
I know the current names have a historical basis (since their predecessors were once located in the home directory, way back in the B.T.C era), but perhaps, if you agree to the change, it could at least be slated for some future migration (to 2.3 or 3.0). Thanks.