When you click on the 'reset' or 'reset page' button, you get a message from webpage : _bx_profile_customize_js_reset and bx_profile_customize_js_reset_page
Keys seem to be missing, although they are in the lang file.
I noticed in the main.js that there is a spelling error : BxProfileCustimizer instead of BxProfileCustomizer
After correcting that, it doesn't work either. Would have been too simple I guess :-)