Miscellaneous

1) is there a possibility for me to see the Menu Structure that this plugin creates after installation?

Ans: No. Read this plugin documentation- https://www.themeum.com/docs/wp-mega-menu-introduction/

2) I am presently testing another mega menu plugin, will your plugin override that plugin or do I have to delete that plugin before I install your plugin?

Ans: You have to use only one plugin so, have to deactivate that. You can check yourself for testing purpose if that works or not.

3) if I decide to not use this plugin permanently, can I simply revert back to the previous plugin and will my changes made using the previous plugin still be in effect, or will I have to repeat all the work that I have done?

Ans: Yes, you can. Watch this video- http://take.ms/8gCpw

also, what exactly does the feature Data Import mean?

Ans: Do not understand your question.