Users from drupal 4.6 to 4.7.x can't see TinyMCE

I have the tinymce module for admin and authenticated user. I updated drupal and modules from 4.6.7 to 4.7.x. I see that my old users can't see the tinymce, because they have disabled it by default (maybe because of the configuration from the old 4.6.x?). In the DB in user > data I can see that the old users have this variables:

a:8:{s:4:"cneb";s:1:"1";s:5:"roles";a:1:{i:0;s:1:"2";}s:16:"privatemsg_allow";i:1;s:20:"privatemsg_mailalert";
i:1;s:18:"htmlarea_isenabled";s:1:"1";s:7:"contact";i:0;s:14:"tinymce_status";s:1:"1";
s:18:"subscriptions_auto";i:1;}

I don't know if I can delete this s:14:"tinymce_status";s:1:"1"; and all users can again have the default configuration, becasuse the new users haven't got this variable.