Aperture Wont Open

Aperture has been just fine...until now. It flat out wont open on my MacBook Pro. I ran into this problem on my iMac a couple of weeks ago and was able to reinstall from my CD. It has been fine since then on the iMac. I'm traveling for the next three weeks and it wont open on my MacBook Pro. I was able to connect to my iMac and copy the Aperture file from my Applications folder to DropBox and then moved that into my Applications folder on the iMac, still no luck. Any ideas? Where can I get a clean image to install from while on the road?