Hi again. Personally, I'm a bit old school in that I grew up with feet and inches (etc) but then they changed over to metric so I still convert back and forth pretty quickly for distances and temps.
I had a quick look at the training plans and I can't see that they are convertible to metric - maybe someone will prove me wrong which I would prefer myself but I just convert everything as I read them.
Just multiply miles by 1.6 (1.6093 is precise) for Km or .6 (.6214 is precise) to go the other way. It isn't precise but it is pretty close. Once you print out a plan you can reconfigure it to metric - annoying but once done it'll work for you.