To Affinity & Beyond

Were the minimum system specs changed for the final release of AP? One of the reasons I purchased it was because it's supposed to be fast and able to handle certain processes in real time. That's not been my experience at all. I tried developing a RAW file and for every button I pressed, AP was a good 3-5 seconds behind. It's been like this since the evening I bought it. I given it a few days and I even exited every other program I had running and restarted my comp - same result.
 
I have a mid-2009 Macbook Pro with 8GB Ram and OSX Yosemite. Is there an option I may have missed in preferences or something? As it stands now, the program is completely unusable to me. I'm willing to try different things because I think there's great potential here and I would prefer to keep it, but not if it runs like this. Any help would be immensely appreciated.

Glad to hear AP works on "older" hardware like ours, so there's some hope this can be fixed. As for me, I recently reformatted my MBP, so I have 386/500GB free. For my photo processing in LR/PS, I work with Canon 7D files off an external 1TB G-Drive. I haven't even been able to get to layers in AP. The program bogs down when I attempt to work on a RAW image. I tried sending from Lightroom>AP and it was slow; so then I just opened up a RAW on it's own and the same problem persists. It's maddening.