eM Client supports importing from Windows Live Mail. The best option for you is to install eM Client and try the import. You should have an option when you initially open eM Client to import from your existing email client, or if not, it is available at any time from Menu > File > Import > Windows Live Mail.
The Pro Licence version is supported internationally, independent of your country of origin. Their replies are usually quite quick, and there is also this forum where you may find solutions to any problems or questions.