Assalamualaikum Ateeq,

I hope you are doing well. 

Can you please check why this is happening after the plugin update? 
https://ibb.co/HT3Dcrn

Error:- 

You need a higher level of permission.

Sorry, you are not allowed to edit posts in this post type.

Also, I applied the purchase code in activation, but when I save the details, it redirects to the same page and again asks for exact information. 

Please deactivate your plugin and then reactivate it so it can generate proper permissions and this problem will be solved. Thanks.