Stuck on this problem for far too many hours today. Ended up following something along the lines that others have discussed, and had to add mock versions of the named services that the uninstaller expects to exist. By tracking results in %temp%\vminst.log I was able to confirm the installer would blow up at each expected service, and putting dummy services in place allowed it to continue through to an assumed success. I then was finally able to install the latest version, and uninstall for good
sc.exe create vmware-converter-agent binPath= "c:\windows\notepad.exe"
sc.exe create vmware-converter-server binPath= "c:\windows\notepad.exe"
sc.exe create vmware-converter-worker binPath= "c:\windows\notepad.exe"
It's a real shame the installer is so brittle and doesn't check for expected services, and skip removing them if the don't exist.