MidiBridge 1.55 is now available on the app store as an update.
This version enables iOS7 users to save scenes and presets and a few other minor enhancements.
Unfortunately, I have been receiving reports that landscape orientation is not working on some devices. I am looking into this as a priority. I did test that rotation was working under iOS5, 6 and 7 and why the app store version is not working is still a mystery.
In summary, if landscape mode is essential for your workflow, then don't update. If you are lamenting the broken preset/scene saving feature in iOS7 then there is a trade-off to consider between that feature and landscape mode.
Apologies to all who are inconvenienced by this.
Update: I have found the issue, have submitted a new release to Apple and have also requested an expedited review from them, so hopefully the landscape issue will be a thing of the past soon.