Smush and Hummingbird Issues

Hello, My WP Smush bulk optimization is running into issues. Partly it's related to my sever going down. Last time I attempted it I got about 30% through. When something like that happens does it just start all over? And how about if I can't keep up with the monthly payments? What happens to all the optimized images? Also, I'm trying to activate Hummingbird but it won't let me. The Activate button is lit up, not the deactivate one. Is this because I'm in the trial period? Can I end the trial period and pay so I can get that plugin?