[support] How to remove completely FCKEditor?

[Afan]

I installed FCKEditor on my Drupal 7 'bout 2 years ago and it was 
working fine. Then one day I realized it stopped working. Don't know 
exactly when it stopped and if it did after some updates or new modules.
I've overwrite the module from backup but didn't help.
Removed completely the module and installed again - nothing.
Removed again the module and installed CKEditor - nothing again. Simply 
there is no (F)CKEditor.
I wonder how to remove 100% (F)CKEditor? I realized that even you remove 
the module, tables in mysql stay...

Thanks for any help,
Afan