Welcome to the community, JohnG
This is a customers-helping-customers forum, so we have no access to the systems to make changes. There is no option to install your own apps on the Sunrise TV Box because an open app store does not exist. You are limited to the applications that Sunrise provides directly on the system. For using a service like Crunchyroll, you should consider using an external streaming device. Good examples with a free app store are Apple TV, Google TV Streamer, or an Amazon Fire TV Stick.
Cheerio, cosmo