You have subscriptions, which is great, so the first thing is done.
Also, I explored the internet and checked GitHub. No script or code is available to download in the bulk, so you have to code it yourself.
Based on my experience with Python and scripting, especially when it comes to scraping, I can guide you a little. I think envato elements support downloading via api.
So the main problem you will face is scraping your category links . I tried writing simple script with bs4 to fetch url from site but it failed because it's protected from bot scrapping. So now to do that, you have to go for a hard method that will take a little bit time to code but not so much difficult.
Use selenium e.t.c and cloudflare bypassing methods. first of all do something like that every single url of web template should be saved in a CSV file. Because this is the main task that is difficult when you got the files with the urls just make a script that use your API to download every file one by one and save it into a folder .
