Can I Change A Listing Plan From Backend (WP-Admin) ?
Aryan is a completely developed system, It has price plans available you can offer Free / Paid plans to your users for listing submission on your website, But if you want to change a listing plan from backend (wp-admin) then you can change it easily by editing a listing.
E.g if you edit a listing at the top right first section you can find the Listing Plan tab in which you are able to see plans related to that listing types attached.
Just click on the dropdown and select the plan you want to have/change it will change that plan after you click on that plan.
Note : if you change a plan from backend it will change make effect that listing available with the features in that plan.