I think the installation might be corrupt or its been removed/uninstalled but the entry remains under “add/remove programs”. I’d recommending sending an email to the author/company to see if they have a safe suggestion.
I used to check “program files” for the application in question, if it wasn’t there any longer I simply used CCleaner - Optimization and Cleaning - Free Download to remove the entry, however this does mean you might end up with unused files on the system.