Samsung WatchfaceStudio 1.5.7 - Error

Hello everyone,
I get an error when using WatchFaceStudio 1.5.7. on my pc with Win 8.1
Can someone offer me a solution ?
This is the error :
Unable to find procedure entry point DiscardVirtualMemory in DLL-file c:\Progrma Files\WatchfaceStudio.exe
Worked before !

Thank you

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