I used to install Windows Commander (later Total Commander) on every system I have used, so much so that I bought the Total Commander licence. However as time passes by I used it less and less, to the point that currently I run it once a month out of pure nostalgia.
I still use it. Did you know it supports extensions? Such as being able to explore SQLite files and so on. A Polish team has put toghether as many extensions as possible into a self contained installer-distro for Total Commander. It is called Total Commander Ultima Prime. I enjoy it a lot.