Can't play two paid versions of PVZ Battle for neighborville at the same time

[mostlymuscles]

I recently bought a second copy of Plants vs Zombies - Battle for neighborville and installed the new version on my Xbox (first version installed on PC).

I used the same EA account to play the Xbox version and now I'm unable to play both at the same time (i.e. when my sons want to play the PC and the xbox version at the same time).

Is there any way I can swap one version to a new EA account? Or is there another way to allow the two versions to play at the same time?

Cheers.