Big reset button?

Is there a big reset button in Opigno? I want to restore the core back to default without removing lessons, courses or classes in place. I have broken the commerce functionality and even after removing and re-installing it, the functionality is crippled (no price field in courses or classes, no options to use in workflow, etc). I think I have also broken some of the OG functionality, which may be related (don't ask how, I think too much late night tweaking to get what I want and got carried away in SQL). Alternatively, is there a way to export the lessons, classes and courses over to a fresh install? Many thanks, A desperate tinkerer who has learnt his lesson