You can go to the Admin-->Posting section to change the editor type.
There you can set for instance a "basic editor".
![](http://www.question2answer.org/qa/?qa=blob&qa_blobid=889383192396120957)
As far as I know, there is not an available q2a plugin for the wysihtml5 editor.
Have a look here , in the "Editors and Viewers" section, which are the available editor plugins for q2a