You can see where all the Uninstall Entries point using HijackThis if needed and also remove entries if they remain on the list after being uninstalled
Save it in a convenient permanent folder such as C:\HijackThis\
Open Hijackthis, Click Open the Misc tools section Then click the Open Uninstall Manager... button. The Add/Remove Programs Manager panel should appear.
HijackThis will show the Uninstall Command for each entry in the top right corner which will show you where the files are located and the Delete this entry button will remove it if the files no longer exist.