Nextgen Gallery plugin's add to gallery/image option not showing

Hi!,
I have using Nextgen Gallery plugin without any issues from 2 yrs or more but suddenly when i removed existing images from a gallery and tried to upload new images, “Add to Gallery/Image” option is not displaying in admin panel(Right handside of dashboard). I can see the link to access this option on the left handside of dashboard.

Please find the below screenshot to understand my point;

https://tlcphp.com/ldt/Screenshots/Screenshot.png

Do anyone have any solutions or suggestions. I am using latest version or wordpress and this gallery plugin.

Pls reply soon.