The only thing you can do is burn them to an audio CD then rip them again, but you're going to lose sound quality. Hopefully, you didn't pay for those files. If you did, you seriously wasted your money.
Are these Urge songs from a subscription (meaning you have to pay a monthly fee)?
You can't burn these to disk and the licence say you can only play them while you are paying the subscription - once you stop the songs are useless.
Sorry for the bad news but this is to stop people subscribing for one month, download heaps of music then putting them on CD etc and not pay the licence fee.
I really, really doubt Switch can convert these. I wouldn't bother even trying.