I've tried to uninstall devstudio 10 GA a few times and got odd results. I'm trying to replicate one of the odd results, so I'll talk about the really odd one I just encountered:
1. Uninstalling by selecting both the the eclipse test instance and devstudio 10 results in restarting devstudio but without these two components available to uninstall. Surely uninstall should just remove devstudio and then exit devstudio.