You can login to both nitroflare.com and nitro.download with the same user/password, it will lead you to the same site, same account, same links.

All links can be opened with nitroflare.com or nitro.download. For example:

Original link:
https://nitroflare.com/view/6C5EA0D386A707E/Emanuelle.in.America.1977.Bdrip.1080p.x264.mkv

Same link but I replaced nitroflare.com with nitro.download:
https://nitro.download/view/6C5EA0D386A707E/Emanuelle.in.America.1977.Bdrip.1080p.x264.mkv