Windows Live Mail

My PC died (cpu/motherboard issue). It was windows 7, with a windows 10 free upgrade (never again!) I was running Windows Live mail on it. I bought a new PC pre installed with windows 10 and of course I know I can't install windows live mail in it. I had loads of important emails, folders etc in WLM. Without having WLM installed, how to I get at the old files exported from the old hard disk drive and imported into a new mail system? Every forum I've visited says the only way to import the files is to export them when you have WLM running - impossible in my case, since it won't install in (pre-installed) windows 10! Any ideas anyone? thanks in advance.