tried updating DCS no update, go into DCS module pop up, I hit download and I get this....
00000.346 --- Log file: D:\Eagle Dynamics\DCS World 2 OpenAlpha\autoupdate_log.txt
00000.000 === Log opened UTC 2018-05-30 13:57:59
00000.053 INFO : DCS_Updater/2.7.3.52 (Windows NT 10.0.16299; Win64; en-CA)
00000.053 INFO : cmdline: "D:\Eagle Dynamics\DCS World 2 OpenAlpha\bin\dcs_updater.exe" --apply install FA-18C
00000.057 STATUS: Initializing...
00000.066 INFO : basedir: D:\Eagle Dynamics\DCS World 2 OpenAlpha
00000.066 INFO : dcs_variant.txt: openalpha
00000.346 INFO : DCS/2.5.2.17559.377 (x86_64; EN; WORLD,FC3,NEVADA_terrain,FC3_video_EN,A-10C,F-5E,MIG-21BIS,CA,P-51D,WWII-ARMOUR,BF-109K4,NORMANDY_terrain,KA-50,POLYCHOPSIM_SA342,RAZBAM_AV8BNA,FW-190D9,SPITFIRE-MKIX,PERSIANGULF_terrain)
00000.346 INFO : branch: openbeta
00000.347 STATUS: Connecting to update servers...
00001.480 INFO : Got reply from http://www.digitalcombatsimulator.com
00001.845 INFO : Got reply from srv11update.digitalcombatsimulator.com
00001.846 STATUS: Verifying cached version info...
00002.297 STATUS: Preparing to install FA-18C ...
00002.564 ERROR: Unknown module FA-18C
00004.322 === Log closed.
I believe we have to wait for the update to drop aswell and then we get the f18 after that so if you're getting this error just wait for the update first.