I tried this, and unable to reproduce. I will detail my steps.
1. Using express vpn, I refresh to a new location, open up recu, I get the captcha page, and pass it.
2. I immediately get the cookies (using EditThisCookie2 firefox extension)
3. I edit my account manager in JD2, updating the password to this cookie (username is still email). This is successful and I see that it shows my basic account.
4. I copy the link that I want to download and paste it in JD2.
5. I right click the link and start the download. But it fails, says it is blocked by cloudflare.