Copy those over from your "vanilla" CFS3 folder. The installation program does not always bring all the .dll's over. It may be a Windows 10 thing but I have run into it several times
Yet you have run multicfs3.exe? That is strange. Is the desktop shortcut to cfs3 set to XP SP3 compatibility, and run as Administrator? Are those files referred to in the errors actually present (they should be in the root path of your install)?
What happens when you run cfs3config.exe? Is the correct PTO folder appearing in the AppData/Roaming/Microsoft pathway?