BaseCamp installation problem USB_64.msi missing

I'm tring uninstall old version of BaseCamp and I'm getting message that USB_64.msi is missing or corrupted, so I cant finish uninstall correctly.
Where can I find this USB_64.msi file, or hot to correct that problem ?
I have tried also install new Base Camp ovet the old one, doesn't work as well.
Please help.