I'm sorry but MIB files can only be read by our Mag+ Reviewer App. However, if you have purchased a license with us you will have access to a Publishing site that you can use to build a test app and show clients. If you're interested in a license please feel free to reach out to email@example.com otherwise you could simply just show your content in the Reviewer App without exiting the issue and showing the Mag+ menu. I hope this helps!
Mag+ Support Team