Been using JF17 in the open beta version , just gone back to flying the stable version because of performance issue's in 2.5.6 micro stutters lighting looking to bright and cockpits lost all there atmosphere.
JF17 will not install bug report below:
00000.000 === Log opened UTC 2020-02-15 13:00:39
00000.008 INFO : DCS_Updater/2.9.8.81 (Windows NT 10.0.18363; Win64; en-GB)
00000.008 INFO : cmdline: "C:\Program Files\Eagle Dynamics\DCS World\bin\dcs_updater.exe" --apply install DEKA_JF-17
00000.011 STATUS: Initializing...
00000.013 INFO : basedir: C:\Program Files\Eagle Dynamics\DCS World
00000.013 INFO : DCS/2.5.5.41371 (x86_64; EN; WORLD,L-39,MIG-15BIS,MIG-21BIS,BF-109K4,F-86F,FW-190D9,MI-8MTV2,UH-1H,A-10C,FC3,CA,P-51D,KA-50,FA-18C,RAZBAM_AV8BNA,PERSIANGULF_terrain,VEAO_HAWK,SPITFIRE-MKIX,NEVADA_terrain,POLYCHOPSIM_SA342,MAGNITUDE3_CHRISTEN_EAGLE-II,HEATBLUR_F-14,F-5E,F-16C)
00000.013 INFO : branch:
00000.014 STATUS: Connecting to update servers...
00000.314 INFO : Got reply from http://www.digitalcombatsimulator.com
00000.975 INFO : Got reply from srv2update.digitalcombatsimulator.com
00000.980 STATUS: Verifying cached version info...
00001.291 STATUS: Preparing to install DEKA_JF-17 ...
00001.467 ERROR: Unknown module DEKA_JF-17
00054.540 === Log closed.