"Aperture library needs to be upgraded" - I don't own Aperture!
On my MacBook Pro, an "Aperture library needs to be upgraded" message pops up when I try to open my iPhoto library that I have stored on an external hard drive. I have no desire to spend $80 on the program nor do I need it for any reason. Is there any way to open my iPhoto library without purchasing it? I've never even heard of the program until the message popped up yesterday afternoon. Please help, I have years worth of photos on it that I now have no access to unless I spend $80 on a program that's about to be taken off of the App Store. I don't know if somewhere along the line I unknowingly saved the library as an Aperture library, or if the recent update to iPhoto affected my main library but either way this was not my intention.
MacBook Pro with Retina display, OS X Yosemite (10.10.2)