No Access to the backend

I have installed the freeversion to my joomla site 3.XX. Now I cant lock in the backend. The regular password doesnt fit. Changing the php-my admin datafile doesnt help ( bak_users ). If i take the "?" on the "admin-mask" i became a new mask on the front end with a requirement for a new password. But the new password given to the regular email Adress doesnt fit.
Please give me support to my email adress.
Thank you

Super Users can not use frontend password recovery. That's a limitation imposed by Joomla it self in Joomlas user object behavior. Installing CB does not alter user passwords or Joomla user objects in any way. If you think CB is blocking backend access then it is likely a PHP related fatal error that's doing it and has nothing to do with your password. To prevent CB from loading in backend either find its database rows in the _extensions table and set their published state to 0 for unpublished or block it from loading by deleting or renaming its component folders in /components and /administrator/components.

Thank you for the hints. i find in database and the ftp-space the following situation:
1: "databaseCB-kingkong123".
1.1 Is it right to change in "database-extensions" enable 1 to 0 in all 5 elements?
These are all elements i find in _extensions.
In the ftp-space i show you the content:
2: the components ( i cant see CB-datas ?)
3: the admin_components ( i cant see CB-datas ?)
4: the path: administrator_modules_mod_cbadmin1 ( the only place i find CB-data. I changed it "1" ) but without any effect.

It seems to me, that only a part of the CB-Component is installed?
So in the forward thank you you for the help if its possible.

Set all extensions enabled column to 0 with Community Builder in the name then do the same with "comprofiler". That will completely disable the CB extension. You should probably just check your server error log as backend is probably being blocked due to a fatal error, which most often happens due to server configuration problems.