There are 2 ways, both take a little doing but are not that hard –
Often what you can do is stick everything in a folder and name the folder something recognizable like “ford-campaign-2018” (or whatever applies, try to avoid spaces in names). Then upload that folder to the banners folder of AdRotate Pro.
You can then select the index.html file in the dropdown menu and use that in the iframe example (next to the adcode field).
That should work.
Another way is rebuild the advert – I have a service for that: https://ajdg.solutions/product/adrotate-html5-setup-service/
Basically it involves editing some files, re-arranging the folders to something more neat. You need HTML knowledge and basic understanding of how html5 adverts work but it’s not all that hard.