This file:
/html/com_jfbconnect/loginregister/default.php
is an override. If it was already there, it means it came with your template (or someone else created it). The original file is:
/components/com_jfbconnect/views/loginregister/tmpl/default.php
The override directory is where you should be editing a file, but you should try to know what changes you've made and compare your override to the new version of JFBConnect whenever you update. That way, you can incorporate any changes we make. For reference though, we don't change that file often, and aren't planning to in the next release (even with the ToS implementation).
If you want you could help me to get the right changes in default.php in jfbconnect loginregister. My idea is to make this work that it only shows required filds which are emty. But this exeeds my poor php and overall knowledge.
Please see
this thread
about hiding those fields, which should already be happening automatically.
Thanks,
Alex