Hi gurus

I have this legacy vcenter that is facing vpxd cert expiration is a windows 2012 r2 and no one knows the @vsphere.local pw, I was trying to use vdcadmintool.exe, in order to temp get access and deal with my issue but vdcadmintool.exe wont run, it shows 0kb, is my take is corrupted or something, I would like to replace this tool to be able to perform , where do I download this tool. ?

Thanks a bunch for any help