After Effects 12.2 terribly slow

I am having great trouble with After Effects 12.2.

Performance is excruciatingly slow. I can barely open the project now, I just get the message: 'Opening… 100 percent complete' - sometimes this allows me to see the project after 10 minutes or the project just stops responding. Saving this project (that includes simple compositions, I use AE for motion tracking and colour grading, not much else).

Here are my system details:

Macbook pro with a 2.7 GHz Intel Core i7 processor

Memory 16GB 1600 MHZ DDR3

Graphics card NVIDIA GeForce GT 650M 1024 MB

I am currently running OS X 10.8.5 and got AE through Creative Cloud.

If you have any advice, I would be really grateful!