Same problem on windows. I installed the latest version and it's perpetually using 0.03 percent CPU with stack:

wow64cpu.dll!TurboDispatchJumpAddressEnd+0x6c0 wow64cpu.dll!TurboDispatchJumpAddressEnd+0xf5 wow64.dll!Wow64SystemServiceEx+0x1ce wow64.dll!Wow64LdrpInitialize+0x42b ntdll.dll!RtlUniform+0x6e6 ntdll.dll!RtlCreateTagHeap+0xa7 ntdll.dll!LdrInitializeThunk+0xe ntdll.dll!NtWaitForMultipleObjects+0x15 kernel32.dll!WaitForMultipleObjectsEx+0x8e flux.exe+0x3921 ntdll.dll!RtlDeleteBoundaryDescriptor+0x1b ntdll.dll!RtlMultiByteToUnicodeN+0x11a kernel32.dll!RegSetValueExA+0x11f flux.exe+0x2841 flux.exe+0x561e8 kernel32.dll!BaseThreadInitThunk+0x12 ntdll.dll!RtlInitializeExceptionChain+0x63 ntdll.dll!RtlInitializeExceptionChain+0x36

More annoying though is the fact that it causes frame skips and audio skipping when I'm using the BSNES emulator. The only remedy is to uninstall it.