10.60 doesn't start (64-bit Portable)

Hi.

I'm trying v.10.60 (64bit portable). The program doesn't open (OS: windows 8.1 pro 64bit) and says:

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System.InvalidOperationException: Thread exception mode cannot be changed once any Controls are created on the thread.

at System.Windows.Forms.NativeWindow.SetUnhandledExceptionModeInternal(UnhandledExceptionMode mode, Boolean threadScope)

at System.Windows.Forms.Application.SetUnhandledExceptionMode(UnhandledExceptionMode mode, Boolean threadScope)

at SoftwareIdeasModeler.Program.Main(String[] args)

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v10.55 (64bit portable) works fine.

Many thanks