Hello,
Please try this link: http://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=MBDSPT
and then select the version 2018.R1:

Apparently, something have changes in the NXP software account management and the link that contains the product IDs as numerical are no longer accessible for first time download. They work only if you have already downloaded the product in the past.
Please let me know if that works.
Thank you!
Daniel