Changing Topic editor

This is the issue from legacy. The default value will overtake when the empty value passed to the global option. The use global option do not work when having use global and a default value. So please select the appropriate editor you would like to use for topics.

Setting JCE explicity gets actually saved, but the JCE menu bar does not show up in the front end.

Moreover, the text in the box is not editable (read-only). 

(please note, I'm setting the topic default editor not quizzes)

Can you please post your JCE profile configuration screenshots?

Please find them attached

Request you to post the configuration of default profile.

Sorry...

The configuration looks good. you are allowing all components and the user groups (hope the user you are using is part of the user groups allowed). Can you please let me know the page URL and the user which you are using so that I can check what is going on?

Well, the configuration is the same that for TinyMCE, I just switched the editor.

I enabled your bodd*** user but if I give the page url you won't be able to edit it any way.
Please feel free to create a new test topic (Engage | Start a topic)  

I don't see the editor with the user. What all user groups this user belongs to?

Exactly, that's the problem.
The user is a vanilla Registered one.

Must be some permission, as the admin sees the editor