I went through the steps you posted on updating Visual Composer, deactivating the old version, deleting old version, going to dashboard, downloading new version, it’s still not working.
Sorry for the late reply.
Did you update theme too? To have the latest VC version, you have to have the latest theme version as well. If you keep an old version of theme, every time you try to update VC, it will install the included version of that theme vs. Which is an old one.
Let us know.