I was waiting for 20.04.1 LTS release to upgrade my laptop that was running 18.04 LTS and I did it last week. I had a problem in the upgrde process and there was probably something not upgraded, because even when there's nothing left to upgrade, there are some things that look just like in 18.04 and some of them look between a new and an old desktop. For example, I have Nemo and Files working at the same time. The menu and settings looks like in 18.04 and there are icons, and themes missing...

Everything works almost fine, but I think the visual part is not well upgraded... How can I reinstall or force a desktop re-configuration?

By the way, I come from 16.04, maybe is time for a fresh install?

Thanks in advance