You can uninstall it and then use a registry cleaner application to completely wipe the files and registry files that keep it locked. It may not work, but it's best to try. Alternatively, you might need to buy the application to be able to use it on your computer. It's a little expensive but if you need it for your work, this shouldn't be a problem since it gets the job done. You can use CCLeaner to remove the registry entries.