It appears as though all versions of the ljwin32_sema client, and versions of the lj_win32 client after v1.3.8 are illegal for use.
The current maintainer of the lj_win32 is claiming that use of any client based from his code is illegal due to licensing violations.
At the present moment, this is still being proven.
So you may have to remove any versions of the Windows client as detailed above.
The thread that starts to try and explain it can be found here.
I hope this gets sorted soon.