Latest version available in "Factorio Mods -> Install" tab is 0.2.8. No new versions after that. Removing and installing changes nothing. Still 0.2.8 only.
Along with that, the game started crashing when you click on the mod in "Factorio Mods -> Manage" tab. It seems like it tries to pull the latest changelog but it doesn't like its content so it fails with:
46.914 Error CachedChangelog.cpp:37: Failed to parse changelog for mod Additional turrets: invalid changelog file, error on line 1, line does not start with exactly ' - ' or exactly ' '..
46.914 Error CrashHandler.cpp:595: Received SIGSEGV
Factorio crashed. Generating symbolized stacktrace, please wait ...
#1 0x00000001045a7ae2 in Logger::logStacktrace(StackTraceInfo*) + 0x12
#2 0x0000000103cd2ca5 in CrashHandler::writeStackTrace(CrashHandler::CrashReason) + 0xc5
#3 0x0000000104591424 in CrashHandler::commonSignalHandler(int) + 0x74
#4 0x0000000104590929 in CrashHandler::SignalHandler(int) + 0x9
#5 0x00007fff603c8b5d in _sigtramp + 0x1d
Stack trace logging done