I just confirmed that it's the previous stable version.
This is what I get.
00000.090 --- Log file: C:\Users\tjmow\AppData\Local\Temp\DCS\autoupdate_templog.txt
00000.000 === Log opened UTC 2023-05-12 00:36:38
00000.016 INFO : DCS_Updater/2.16.2.17 (Windows NT 10.0.19044; Win64; en-US)
00000.017 INFO : src-id: 5972e82a1851d36865c17506579c27cbd5b8e3b4, lib-id: b88ea51ae2210987a3865f77cc1802548216d7a8
00000.017 INFO : cmdline: DCS_updater.exe update 2.8.1.34667.2@stable
00000.087 STATUS: Initializing...
00000.088 INFO : basedir: D:\DCS World\DCS World\
00000.089 INFO : DCS/2.8.4.39731 (x86_64; EN; WORLD,FC3,MARIANAISLANDS_terrain,RAZBAM_AV8BNA,CAUCASUS_terrain)
00000.089 INFO : branch:
00000.091 STATUS: Checking for updates...
00000.896 ERROR: www.digitalcombatsimulator.com replied HTTP 404 Not Found
00000.898 STATUS: 404 Not Found
00093.803 === Log closed.
and when I tried 2.7.18.30765
00000.000 === Log opened UTC 2023-05-12 00:38:42
00000.016 INFO : DCS_Updater/2.16.2.17 (Windows NT 10.0.19044; Win64; en-US)
00000.016 INFO : src-id: 5972e82a1851d36865c17506579c27cbd5b8e3b4, lib-id: b88ea51ae2210987a3865f77cc1802548216d7a8
00000.017 INFO : cmdline: DCS_updater.exe update 2.7.18.30765@stable
00000.085 STATUS: Initializing...
00000.086 INFO : basedir: D:\DCS World\DCS World\
00000.086 INFO : DCS/2.8.4.39731 (x86_64; EN; WORLD,FC3,MARIANAISLANDS_terrain,RAZBAM_AV8BNA,CAUCASUS_terrain)
00000.086 INFO : branch:
00000.088 STATUS: Checking for updates...
00002.055 ERROR: www.digitalcombatsimulator.com replied HTTP 404 Not Found
00002.056 STATUS: 404 Not Found
00007.052 === Log closed.