Window 10 mail app problems?

I have a Dell Desktop and was running windows 10  using the non supported windows live mail app. (no longer available for download)

   The desktop was hacked or spyware caused it to fail and the only way to get some of it back was to do a Dell Reset on it.

 It kept most all folders and documents but all of the apps were gone as was my WLM account.

   In that account I have many things stored under subs in the drafts folder, information I had at my fingertips about autos , serial numbers etc.

 I set up a new account on Windows 10 , a pop3 account, that I have to use because it is what all my customers friends and relatives have used for almost 20 years.

     I will have to get used to it as it works different than the WLM account  but I would like to try to import the files and folders from my WLM account to this new account someway?

   I know they must be hidden on the PC but  don't know where or how I would do that.

I really need to keep the pop3 account because I see no way of using my email address with something like a .com , Gmail, or .live account?

 my account has the IP name in the address and ends in a .net 

 I appreciate any help.