May i know which directory that you refer on above?
FYI, VC plugin file was included on theme package. The plugin file you can find on this path jkreativ-themes/plugin/ (parent theme).
Previously, i just update VC plugin from WordPress admin dashboard. In this case you just need to visit plugin dashboard, deactivate the old version of VC plugin then delete it. After that, navigate Appearance > Install Plugins and you can install new version of VC plugin.