Has Anyone Used The Health And Retirement Study 2016

I was doing a project using the Health and Retirement Study (HRS) but it turns out the years I wanted to use would not work but 2016 would. The data is downloading as a .dat file which means that it is not possible to open. Has anyone ever used it in the past before it was converted to a .dat file. I need to make this change in 24 hours and have spent the last few months trying to clean the other data I thought I needed. Now I need to make this switch.