I received an email saying that my free trial was going to be ending in a week or so. My icon disappeared, I re-downloaded it, and my pictures I put on there were still there but I can't find the edited photos.
If your edited versions of your images we uploaded before the app was removed - they should still be in your account. You are certain the edited images were uploaded? Do you have another Mac or iOS device to install Revel and check with?
A quick aside. The app doesn't "self delete" after the 30 day trial. On the contrary we want it there so you will subscribe. So I can't explain why the app disappeared - do you have multiple users on your machine?.