I'm trying to open a file that I was working on at school and am getting the error that I'm not at 13.1.1. I've run updates and am only at 188.8.131.52. Am I doing something wrong? Was this another version that I was using at school? Any advice would be greatly appreciated. Thanks!
Yes, you were using AE CC 2014 at school. AE projects are for obvious reasons like features not existing in older versions not backward compatible like your CS6. This is nothing that can be resolved easily unless you have all inbetween versions at hand and can make use of the "save as one version back" feature.