Exception Unhandled

[Pusher91]

I'm running into the below error and I'm not sure why. This is freshly downloaded. Watson worked for me before, I reinstalled/reformatted Windows, and now it will not run.

System.Collections.Generic.KeyNotFoundException
HResult=0x80131577
Message=The given key was not present in the dictionary.
Source=mscorlib
StackTrace:
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Watson.Program.Main(String[] args) in C:\Users\****\Source\Repos\Watson\Watson\Program.cs:line 25

Thanks

[Pusher91]

I was running this on a version of Windows that is unsupported.