Studio 2015: Can't work with ITD files

Question

ITD files won't open in Trados Studio 2015, old projects open but won't export ITD files. How can I fix this? Please help! 
 Failed to save target content: Unexpected exception during ITD file writing: Please see the error details for more information. 
 System.Exception, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 
 System.IO.FileNotFoundException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 
 Microsoft Windows 10 Home 
 8007007e

Fredrik Sigeman · Accepted Answer

I reverted to Win 8.1 and now it works (it seems). So it seems to be something with Win 10 (though it worked in Win 10 for the first couple of days, so probably some update created the problem).

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Studio 2015: Can't work with ITD files