Sorry carretero that i don't have any solution for this, but i've the same problem.
Today when i've try to run media center, it has appear the same message that you have write
This beta of Media Center has timed out.
Please visit www.jrmediacenter.com to get the latest version.
I have to say that i was running MediaCenter10013 without purchase it yet (i was waiting for the 30 days trial to finish- i'd a license for V8 but it was expired, i think ?). So i've made 2 things: i've downloaded the latest beta version MediaCenter10027 and i've buy the license for v10.
When i try to install MediaCenter10027 it begin the first phase
media center set up is preparing install wizard wich will guide you through the rest of the set up process. Please wait
but after this don't make nothing (it fades and doesn't do anything more)
I remember something similar happened with beta version of v9, but i can't remember what was the solution.
I think that i could use MediaCenter91315, but i'll prefer to use v10 cause i like it more (and cause i've paid for it
)
Well, hopefuly in some hours someone will give us the right solution