It is not possible to select or change radio stations using the EVO remote control. The exception to this, is that you are able to recall the first 3 saved radio presets via the numbered buttons on the remote control.
If you save radio stations as presets in the app, you'll be able to play presets 1 to 3 via the remote control. Please see the FAQ on assigning radio stations as presets in the StreamMagic app here.
You will be able to select and search for internet radio stations, as well as save and recall up to 99 radio presets, using the StreamMagic app.