I get the same message, "Feature Not Supported".
I can not remember when I loaded the Version 15 if there were any settings for this support, etc
I moved the two file to the root of the C drive, got tired of bouncing down the long paths. I also ran Process Monitor and this is the result when hitting the "Save" button.
5216	10:59:18.7683257 AM	ColorConversion_Original.exe	2928	CreateFile	C:\Master.JPG	SUCCESS	Desired Access: Generic Read, Disposition: Open, Options: Synchronous IO Non-Alert, Non-Directory File, Attributes: R, ShareMode: Read, AllocationSize: n/a, OpenResult: Opened
5217	10:59:18.7684373 AM	ColorConversion_Original.exe	2928	QueryStandardInformationFile	C:\Master.JPG	SUCCESS	AllocationSize: 40,960, EndOfFile: 38,276, NumberOfLinks: 1, DeletePending: False, Directory: False
5218	10:59:18.7684741 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 8, Priority: Normal
5220	10:59:18.7686514 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 2
5222	10:59:18.7687063 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 1,024
5224	10:59:18.7687868 AM	ColorConversion_Original.exe	2928	CloseFile	C:\Master.JPG	SUCCESS	
5225	10:59:18.7826021 AM	ColorConversion_Original.exe	2928	CreateFile	C:\Master.JPG	SUCCESS	Desired Access: Generic Read, Disposition: Open, Options: Synchronous IO Non-Alert, Non-Directory File, Attributes: R, ShareMode: Read, AllocationSize: n/a, OpenResult: Opened
5226	10:59:18.7827038 AM	ColorConversion_Original.exe	2928	QueryStandardInformationFile	C:\Master.JPG	SUCCESS	AllocationSize: 40,960, EndOfFile: 38,276, NumberOfLinks: 1, DeletePending: False, Directory: False
5227	10:59:18.7827372 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 8, Priority: Normal
5228	10:59:18.7828285 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 2
5230	10:59:18.7828811 AM	ColorConversion_Original.exe	2928	ReadFile	C:\Master.JPG	SUCCESS	Offset: 0, Length: 1,024
5232	10:59:18.7829504 AM	ColorConversion_Original.exe	2928	CloseFile	C:\Master.JPG	SUCCESS	
Everything looks OK but I don't see any attempt to "write" and the same message. Anything to do with UAC which I have turned off?