Notion not opening

Hi everyone. I recently bought Notion for the iPad. It was opening with no problem until I did the latest iPad update to Version 5.0.1 (9a405). As well there are other programs that are not opening. Is anyone having the same pr problem?
One other thing. I attached my NOVATION Xio midi controller to the iPad this morning. And it seemed like things did not work after that. Do you think the midi connection messed things up?
I also went to the app store to check for updates. Everything is up to date. Not sure what to do.
Any ideas?
Many thanks. Jeff
One other thing. I attached my NOVATION Xio midi controller to the iPad this morning. And it seemed like things did not work after that. Do you think the midi connection messed things up?
I also went to the app store to check for updates. Everything is up to date. Not sure what to do.
Any ideas?
Many thanks. Jeff