Need to upload multiple image with the existing functionality

I am using this plugin to create a campaign.
current process:
First step is to fill details.
Second step to upload image or video only one at a time.
If image uploaded, then it will show te preview such the one can change the position, rotate
On preview screen there is a save and conntinue button, user will click button and take them to next step where user can see the modified image and button to Add more image.
On Add More, same process will continue again

Current plugin allow to upload images one by one rather then multiple images at once.

I need to modify the plugin file such that i can upload multiple images at once and can skip the edit image step.

Can you explain how i can go with this?