Importing Certificates into Kleopatra in Windows 10

[Jerry]

I know that this is probably a stupid question, but I cannot find the
answer anywhere.

I just installed Claws-Mail and GPG4Win on a Windows 10 Pro/64 machine.
I want to import all of my certificates from my old machine. It is still
up and running. I imported:

trustdb.gpg
secring.gpg
pubring.gpg

This gave me all of the keys I had save on the older machine.

Now, I need to import my private keys; however, I cannot figure out
how to do it. I would appreciate any assistance possible.

-- 
Jerry