Finally I ended using (it's also working for different languages of Recaptcha challenges) if someone searches for the same:
">CSS>iframe[src^=' https://www.google.com/recaptcha/api2/bframe ']>FRAME> >CSS>#recaptcha-verify-button"
bablosoft has never mentioned the possibility of downloading any old versions of BAS. Change the versions in the link, older or newer versions may be available for download.
