I'd advise you to immediately make duplicate copies of your recovered DBX files. Save the duplicates somewhere safe and don't mess with them.
Then try using any of the various tutorials you found on the Internet using one copy of your recovered DBX files.
I've done it quite a few times, but that was years ago and I have deleted my self-made instructions about how to do it.
There is no simple way if an ordinary "import" as mentioned by Roncerr won't work.
You may have to just keep making attempts, using one tutorial after another.
As long as you have those unaltered backup copies of your DBX files, you should survive it----other than the frustration. PC email remains a mess.