I updated wysiwyg-editor plugin with CKEditor v4.6.2 (from v4.4.7) for Q2A v1.7.4 , You can download from here
If you want to see demo of above plugin then check here. test before you use this plugin on production site.
You need to remove default plugin then add this.
Welcome to the Q&A site for Question2Answer.
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July 15, 2020: Q2A 1.8.5 released!