Release for Just Another Day 2.21, released on Jan 23 2017
Might also want to check out the Getting Started forum on HLP if this is all new to you.
The Easy Way
Download it on the FSO Installer
The Hard Way
- Download JAD2-21.rar and extract in your root FreeSpace 2 directory (so the exes and JAD2-2 folder should be in the root directory)
- Using wxLauncher, select the fs2_open_3_7_5_x64_SSE2_JAD.exe build, mess around with your settings (leave 'use 3d models for ship and weapon selection' off)
- Select the Just Another Day 2.2 mod
(Note you don't need the JAD builds in particular. You can also use the latest nightly FSO builds if you are feeling brave!)
If you have any troubles either check out HLP's support forum, or the JAD troubleshooting thread!
And be sure to check out all the other amazing FreeSpace mods!