Can My PiCorePlayer do other things too?

I must admit to having zero knowledge of Linux but with the help of this forum I built a Pi based LMS using PiCorePlayer and also use it to store all my music on a SSD.

Is it possible to run other programs too? I'm thinking of JRiver Media Centre which I use for all my music management, they have a Pi version available and I would like to use their media network to share music to other devices than my Squeezeboxes.

Is this possible?

Thanks in advance

Craig