issue installing HSIE V16B1 patch

[_JMac]

Hi everyone,

I am getting this error message in the Cmd window when clicking to install the Patch batch file:

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Found compatible version sh3.exe (STD)

Press any key to continue . . .

Making backup sh3.old

Access is denied.
0 file(s) moved.
Press any key to continue . . .

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Patching....


C:\Program Files (x86)\Ubisoft\SilentHunterIII>.\tool\xdelta3.exe -d -s sh3.old .\tool\V16B1_STD sh3.exe
xdelta3: file open failed: read: sh3.old: The system cannot find the file specified.

Exit.

Press any key to continue . . .

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Any ideas? I'm running the DVD 1.4.01 version on Windows 10 Pro. I've tried running in admin and clicking full control is selected in permissions.

Thanks
JMac